Reverse Dictionary: DRUO – DUL

– dry SICCED 1667 obs.
– dry and hot, burning ADURENT 1626 obs. rare
– dry, arid SICCANEOUS 1656 rare
– dry, hard, harsh, hot VENOM Bk1905 Eng. dial.
– dry, harsh HASKISH Bk1902 Eng. dial.
– dry, insipid DAFFY Bk1900 Eng. dial.
– dry, juiceless; thirsty KECKSY 1874 Eng. dial.
– dry, parched BASKED Bk1898 Eng. dial.
– dry, parched HASKY 1790 Sc. & Eng. dial.
– drying HAZLING Bk1902 Sc.
– drying; having the property of absorbing moisture SICCATIVE 1547
– extremely dry; desirous of alcoholic refreshment DRY AS A DEAD DINGO’S DONGER Bk1999 Aust. sl.
– extremely dry; desirous of alcoholic refreshment DRY AS A GUMDIGGER’S DOG Bk1999 Aust. sl.
– extremely dry; desirous of alcoholic refreshment DRY AS A KOOKABURRA’S KHYBER IN THE SIMPSON DESERT Bk1999 Aust. sl.
– extremely dry; desirous of alcoholic refreshment DRY AS A POM’S TOWEL Bk1999 Aust. sl.
– extremely dry or rainless DRY-AS-DUST 1889
– half-dry HAZEL Bk1902 Eng. dial.
– having power to make dry SICCIFIC 1656 obs.
– having power to make dry SICCIFICAL 1656 obs.
– in a dry condition ADRY 1628
– quite dry, not the least wet THREAD-DRY 1896 Sc.
– so dry as to make a rustling sound REESLIN-DRY 1801 Sc.
– very dry DRY AS A KECK 1896 Eng. dial.
– very dry DRY AS A NUN’S FANNY Brit. sl.
– very dry DRY AS A NUN’S MINGE Brit. sl.
– very dry DRY AS A POPCORN FART 1970 Amer. dial.
– very dry STRAW-DRY 1951
– very dry, very thirsty SITICULOUS 1620 obs.
DRY etc. – NOUNS
– a drying or airing in the sun; a drying clothes lightly HAIZER 1887 Sc.
– a dry place; dry land DRYNESS a1398 obs. rare
– dryness; absence of moisture SICCITUDE 1599 obs.
– dryness; absence of moisture SICCITY 1477 obs.
– dryness, drought; a dry place, desert DRYHEAD a1300 obs.
– dryness, harshness HASKNESS Bk1902 Eng. dial.
– dryness, dry condition DRYTH a1533 obs. exc. Eng. dial.
– fear of dryness and dry places, as deserts XEROPHOBIA Bk1991
– symbolic of dryness (generally a snooker player keeps his chalk in his waistcoat pocket – what the thirsty may claim to have a throat like) SNOOKER PLAYER’S POCKET Brit. sl.
– the process of drying SICCATION 1612 obs.
DRY etc. – VERBS
– to dry by exposure to the air; to half-dry, to dry on the surface HAZE 1819 Sc. & Eng. dial.
– to dry by the heat of the fire; to warm REESTLE 1824 Sc. obs.
– to dry by the heat of the sun or fire REEST 1805 Sc.
– to dry, esp. partially or on the surface; said of newly-washed clothes, etc. HAIZER 1880 Sc.
– to dry in the sun BEAZE Bk1898 Eng. dial.
– to dry or air thoroughly (often said of clothes by the fire) RASH B1900 Eng. dial.
– to dry or mop up a wet place HAP Bk1905 Eng. dial.
– to dry, season in the sun; to dry on the surface HAZEL;  HAZLE;  HAZZLE 1642 Sc. & Eng. dial.
– to dry, to shrivel up; to make limp or flabby QUADDLE;  QUODDLE 1777 Eng. dial.
– to dry up; to become dry or withered ADROUGH c1000 obs.
– to dry up; to become dry or withered ADROWE c1000 obs.
– to dry up with heat; to burn, to scorch, to scar ADUST 1550 obs.
– to let dry by exposure to air; said of clothes SEASON 1979 Amer. dial.
– to make dry SICCATE 1570 obs. rare
– to make dry SICCICATE 1639 obs. rare

– to dub, to knight; to invest with the insignia of knighthood ADUB c1450 obs.

– dubious, doubtful DUBERSOME 1837-40
– dubious, doubtful JUBEROUS 1871 Amer. dial.
– dubious, doubtful JUBERSOME Bk1913-17 Amer. dial.
– dubious, doubtful, dangerous DUBROUS Bk1913-17 Amer. dial.
dubious, doubtful; hazardous DOUBTY c1380 obs. rare
– dubious, doubtful, uncertain, suspicious DUBEROUS 1818 Eng. & Amer. dial.
– dubious; irregular; illicit LEFT-HANDED 1612
– dubious, obscure UMBRAGEOUS;  UMBRAGIOUS 1635 obs.
– dubious, perplexing, doubtful, debateful QUISQUIS 1720 Sc. obs.
– dubious, perplexing, doubtful, debateful QUISQUOSE 1720 Sc.
– dubious; questionable; likely to be improper or illegal FISHY Bk2006 US sl.
– dubious, uncertain MISDOUBTFUL 1927 Amer. dial.

– anything dubious, as a knockout, a cross fight, a cheat, confidence trick RIG Bk1903
– dubious activities MONKEY TRICKS 18C sl.
– something dubious or unreliable QUEER PAPER M19 sl.

– a dubious, dishonest person TALLY-BOY 1978 Irish sl.
– a dubious, dishonest person TARRY-BOY 2004 sl.

– to be or remain in dubious suspense; to be doubtful, undecided; to be irresolute, to vacillate HANG IN THE WIND 1555

– a call for young ducks DIDDLE! Bk1900 Eng. & Amer. dial.
– a call to ducks QUACK, QUACK, QUACK, COME TO MEAT! Bk1905 Eng. dial.
– a call word for ducks DILL! Bk1900 Eng. dial.
– a call word for ducks DILLY! Bk1900 Eng. dial.
– a call word for ducks QUEETICHIE 1928 Sc.
– a call word for ducks QUEETLE 1928 Sc.
– a call word for ducks QUYTIE 1928 Sc.

– a brood of young ducks TEAM 1858 Eng. dial.
– a brood or small group of ducks BADELYNG;  BADLING 1486 obs.
– a duck DIG;  DIGG 1873 Eng. dial.
– a duck DIGGER Bk1900 Eng. dial.
– a duck GUCK 1887 Sc.
– a duck QUACK L19
– a duck QUACKER 19C colloq.
– a duck QUACKIE 1830 Sc.
– a duck QUACKING-CHEAT 1620 cant
– a duck QUACK-QUACK 1865
– a duck SUBMARINE World War I Amer. sl.
– a duck-calling device QUANKER 1945 Can. sl.
– a duckling DIGGEY Bk1900 Eng. dial.
– a duck or drake RED-SHANK Bk1903 sl.
– a fledgling wild duck FLAPPER Bk1893 sl.
– a flight of mallards SUIT 1486 obs.
– an area of marsh where ducks nest DUCK FACTORY 1964 Can. sl.
– a wild duck PADDLER 1882
– a young duck DIG-BIRD Bk1900 Eng. dial.
– a young duck DILL;  DILL-DUCK 1895 Eng. dial.
– ducklings DIDDLES 1819 Eng. dial.
– ducklings DIDDLINGS 1819 Eng. dial.
– the mallard ICEBREAKER 1923 Amer. dial.
– the peeping cry of young ducks QUEEPLE 1866 Sc.

– a person with strong concerns about rescuing oil-covered ducks DUCK-SQUEEZER Bk2006 US sl.

– to carve a duck or mallard UNBRACE c1470 obs.
– to dive; said of ducks BEAVE Bk1898 Eng. dial.
– to quack, as a duck QUACKLE 1564
– to quack in a squeaking, high-pitched tone, as ducklings do QUEEPLE 1880 Sc.
– to trample grass, etc.; said of ducks WADDLE Bk1905 Eng. dial.

DUCK (to stoop down) – VERBS
– do duck, to dip, to dive; to stoop down suddenly DAP DOWN 1842 Eng. dial.

DUCKS AND DRAKES – NOUNS (also see stone)
– ducks and drakes, throwing a flat stone over the surface of water so that it jumps several times LAME DUCK 1968 Amer. dial.

– dud; counterfeit; gaudy or cheaply made BRUMMY 1886 Aust. sl.

– a dud; a disappointment; a lost cause, a failure BLUE DUCK 1889 Aust. & NZ sl.
– a dud; a failure; something worthless or inferior DOG 1917 sl., orig. US

– due, needful, necessary BEHOVEFUL 1382 arch.
– due or owed ADDEBTED 1824 Sc. obs.
– due, owed DEBTED c1375 obs.
– due, owed, bounden; dutiful DEBTFUL c1425 chiefly Sc. obs.
– due, owed, owing DEBT c1340 obs.
– due, seasonable TIMEFUL a1300 rare
– that is due or owed DEBITE 1678 obs. rare

– due, owing ENDUE;  INDUE 1892 N. Ireland

– due, owed ON 1910s sl.

relating to duelling DUELLISTIC 1852
– relating to duels or duelling DUELLARY 1612 obs. rare
– resembling a duel; likely to lead to a duel; of a person: given to duelling DUELSOME 1840 rare

– a duel DUELLO 1606 obs.
a duel; an ‘affair of honour’; BUSINESS 1612 obs.
– a duel; an argument DUELLION a1637 obs. rare
– a duel; an encounter, combat, or contest TILT 1567
– a duel; an instance of single combat DUELLATION 1502 obs. rare
– a duel; a prearranged contest fought with a rival in order to defend one’s honour or reputation AFFAIR OF HONOUR 1737
– duelling, as a custom or practice; the established code or set of conventions followed by duellists DUELLO 1598 rare
– the practice of engaging in duels DUELISM;  DUELLISM 1602 rare

– a duellist; one who fights in single combat MONOMACHIST 1828 rare

– to engage in a duel or combat DUELLIZE 1624 obs. rare

– a lean-to, a shelter; a dugout KIPSIE; KIPSY 1919 Aust.

– characteristic of a duke or dukedom DUCAL a1513

– as a duke DUCALLY 1823

a duke’s rule or term of office DUCHERY 1387 obs.
– the domain or territory of a duke DUCHERY a1400 obs.

– a little or petty duke DUKELET 1870
– a little or petty duke DUKELING 1634

– dull and unadventurous; having an old-fashioned or unoriginal outlook; fogeyish MUSTY 1603
– dull, boring, feeble DRIPPY 1952 colloq.
– dull, boring, tedious HO-HUM Bk1942 Amer. sl.
– dull, doltish; stupid; with brains made of clay CLAY-BRAINED 1596
– dull, down-hearted DARKET Bk1900 Sc.
– dull, dreary; awful; unpleasant DRACK 1944 Aust. sl.
– dull, dreary, miserable; nauseating DAWLSOME Bk1900 Eng. dial.
– dull, foolish NISEY 1709 obs.
– dull, foolish NIZY;  NIZZIE L17 sl.
– dull, foolish SAMMY E19 sl.
– dull, gloomy, tedious; said of a place, occasion, etc. MUZZY 1728
– dull, humdrum; ordinary, commonplace; lacking interest or excitement MUNDANE 1850
– dull, idiotic, stupid DOOFLESS 1970s US sl.
– dull, inactive DAULING Bk1900 Eng. dial.
– dull, inactive, doltish DAUSEY;  DAWSIE;  DAWSY 1889 Sc. & Eng. dial.
– dull, inactive, spiritless, stupid DEAD-AND-ALIVE a1862 chiefly US
– dull, inactive, spiritless; stupid DEAD-ALIVE 1591 chiefly US
– dull, inanimate, not enlivened UNANIMATE 1614 obs.
– dull in intellect; stupid HAMMER-HEADED 1552
– dull, insane, crazy; foolish, stupid LOLO 1938 Hawaii
– dull, lazy HEAVY-ARSED;  HEAVY-ASSED Bk1902 Eng. dial.  
– dull; lifeless DRY-AS-DUST Bk2006 US sl.
– dull, listless DAWKIN 1854 Eng. dial.
– dull or lacking in interest PRECIOUS 20C teen & high school sl.
– dull or lacking in interest QUAINT 20C teen & high school sl.
– dull or lacking in interest SPECIAL 20C teen & high school sl.
– dull or pedestrian; lacking in imagination EARTHBOUND 
– dull; out of it GENERIC 20C teen & high school sl.
– dull, passive, inactive; leading a merely physical existence VEGETIVE 1882
– dull, sad, melancholy SAFFLE Bk1904 Eng. dial.
– dull, silly, stupid, clownish, mischievous AWF-STRUCKEN Bk1898 Eng. dial.
– dull, silly, stupid, clownish, mischievous AWVISH 1819 Eng. dial.
– dull, slothful, sluggish, idle, slow THOKISH 1682 Eng. dial. obs.
– dull, slow DOZEY World War I Amer. sl.
– dull, slow-witted THICK AS A BRICK Bk1999 Aust. sl.
– dull, slow-witted THICK AS THE DUST ON A PUBLIC SERVANT’S OUT-TRAY Bk1999 Aust. sl.
– dull, spiritless, inactive INANIMATED 1753 obs.
– dull, square, corny NOPLACEVILLE Bk1974 Amer. sl.
– dull, stupid AGGERHEADED Bk1898 Eng. dial.
– dull, stupid BEETLE-HEADED 1553-87
– dull, stupid DAKES-HEADED 1893 Eng. dial.
– dull, stupid DINSH Bk1900 Eng. dial.
– dull, stupid DOWFART E18 Sc. arch.
– dull, stupid DULL AS A BEETLE 1520
– dull, stupid DULT a1250 obs.
– dull, stupid DUMB AS A BEETLE 1566
– dull, stupid FAT-HEADED c1510
– dull, stupid FROST-BRAINED 1592 obs.
– dull, stupid HEAVY-HEADED 1590
– dull, stupid LOGGERHEADED L16 sl.
– dull, stupid LOGY 1899 Amer. dial.
– dull, stupid MENSO Bk1970 US high school sl.
– dull, stupid MONG 1970s sl.
– dull, stupid MONGIE;  MONGY c1975 teen sl.
– dull, stupid MONGISH 1980 teen sl.
– dull, stupid MOSSY c1595 jocular usage
– dull, stupid NEEP-HEADED 1875 Sc.
– dull, stupid NEIP-LIKE 1897 Sc. 
– dull, stupid NUMB-HEADED 1856 Amer. dial.
– dull, stupid SAD AS ANY MALLET 1645
– dull, stupid STOCKISH 1600
– dull, stupid THICK-LISTED 1777 Eng. dial.
– dull, stupid, absent-minded LUNCHY 1960s US college sl.
– dull, stupid; absurd DEAF c1440 obs.
– dull, stupid, doltish; stubborn LOGGEREDY-HEADED 1964 Amer. dial.
– dull, stupid, doltish; stubbornly at odds LOG-HEADED 1889 Amer. dial.
– dull, stupid, dumb; clumsy; not very alert or unaware NUMB 1966 Amer. dial.
– dull, stupid, foolish, silly LEFT-WITTED 1616 rare
– dull, stupid, half-witted SOFT-ARSED 2002 UK sl.
– dull, stupid, idiotic DAFF Bk1900 Eng. dial.
– dull, stupid; ignorant SWIFT Bk1970 US students’ sl.
– dull, stupid, slow DUMMEL 1878 Eng. dial.
– dull, stupid, slow of comprehension THICK IN THE HEAD 1871 Sc.
– dull, stupid, slow of understanding, inapprehensive HEAVY c1300 obs.
– dull, stupid; slow to learn or understand; lacking in intelligence DUNCH 1825 colloq. obs.
– dull, stupid, slow-witted; inactive, inert, spiritless; destitute of sensation; abstracted, insensible to outward things; dull, uninteresting DUMPISH 1545 obs.
– dull, stupid, slow-witted; wandering in mind IDLE-MINDED 1967 Amer. dial.
– dull, stupid, sluggish DEAD-LIVERED Bk1900 Eng. dial.
– dull, stupid, thick-headed RAM-HEADED 1813
– dull, stupid, uninspiring LUNCHBUCKET 1950s US sl.
– dull; tedious and uninteresting DEAD 1000
– dull, unattractive; unpleasant, objectionable REBARBATIVE 1892 rare
– dull, uneventful, featureless, monotonous VEGETABLE 1854
– dull, unstimulating; concerned with petty matters; slow, dawdling, sluggish POKY 1828 chiefly Amer.
– dull; unexciting LUKEWARM TURD Bk1970 US students’ sl.
– dull, very dreary, uninteresting DREARY AS BATSHIT 1964 Aust. sl.
– dull, wanting in lustre LACKLUSTROUS 1834
– dull-witted SHARP AS A BILLIARD BALL 20C Aust. sl.
– dull-witted, foolish, mad, absurd DAFT-LIKE 1790 Sc. & N. Eng. dial.
– dull-witted, slow mentally WOODEN-HEADED Bk2002
– dull-witted, stupid, blockheaded, simple-minded DUNSTICAL1563 obs.
– dull-witted, stupid; confused in mind MUDDY-BRAINED 1634
– dull-witted, stupid, doltish; like a dunce or blockhead DUNCICAL 1588 rare
– dull-witted, thick-headed, stupid, doltish BEEF-WITTED 1606
– extremely dull, very boring DULL AS ARSE 2002 UK sl.
– mentally dull, witless, stupid MIZZLE-WITTED 1935 Amer. dial.
– very dull DEADLY (DULL) Bk2006 US sl.
– very dull or stupid DUMB AS A DEEP SEA OYSTER Bk1913 Amer. dial.
– very dull, uninteresting BORING AS BATSHIT 1964 Aust. sl.
– dully, stupidly SUMPHISHLY 1802 Sc. & N. Eng. dial.
– in a dull or inert manner; stupidly BOVINELY 1900
– dull and unoriginal character; old-fashioned quality; outmodedness MUSTINESS 1867
– dullness, foolishness DAFTNESS 1887 Sc. & N. Eng. dial.
– dullness of intellect, stupidity SUMPHISHNESS 1846 Sc. & Eng. dial.
– dullness, slowness POKINESS 1886 US
– dullness, stupidity, obtuseness; insensibility OBTUSITY 1823 
– dull or boring matter HO-HUM 1960s Amer. sl.
– something dull and boring DRAG Bk2006 US sl.
– a completely dull, ineffectual, unattractive, or insignificant person; a person without much social or academic ability; a nobody ZILCH 1967 US sl.
– a dull and conservative person; a person who has no sense of fashion DAG 1966 Aust. sl.
– a dull and generally unpleasant person STIFF Bk1913-17 Amer. dial.
– a dull and ineffectual person; a lifeless or boring person DEADHEAD 1907 sl.
– a dull and undersexed male HARD OFF Bk2007 US sl.
– a dull and unresponsive person COLD FISH Bk2006 US sl.
– a dullard LOG 1895 US sl.
– a dullard; a dazed, stupefied, or inert person DASART a1400 obs. rare
– a dullard; a dense person DENSO 1987 US sl.
– a dullard; a dolt, a stupid person MARBLE DOME 1919 Amer. sl.
– a dullard; a dolt, a stupid person MARBLEHEAD 1919 Amer. sl.
– a dullard; a dolt; one inert or dull of wit DASTARD c1440 obs.
– a dullard; a fool CAKE 1841 sl.
– a dullard; a fool CAKEY 1841 sl.
– a dullard; a fool DARK 1960s US students’ sl.
– a dullard; a fool LOGGERHEAD L16 sl.
– a dullard; a fool LOOB M14 Eng. dial.
– a dullard; a fool LOOBY 1682 Eng. dial.
– a dullard; a fool; a simpleton; a stupid fellow SARDINE 1857 US sl.
– a dullard; a fool; a slow-witted person having a coarse or foolish appearance; a simpleton AARDVARK 1968 Amer. sl. 
– a dullard; a fool, a stupid person, a simpleton; a dolt, an oaf MOPE c1390
– a dullard; a foolish bungler; one whose head is addled ADDLE-HEAD 1592
– a dullard; a foolish bungler; one whose head is addled; a stupid or half-witted fellow ADDLE-BRAIN 1799 
– a dullard; an oaf DROOB;  DRUBE Bk2006 US sl.
– a dullard; an oaf SHUTTLE-BRAIN 16C colloq.
– a dullard; an oaf SHUTTLE-HEAD 16C colloq.
– a dullard; an oaf SHUTTLE-WIT 16C colloq.
– a dullard; an oaf STUMBLE-BUM M20 US sl.
– a dullard; an oaf; a gullible person; a dupe APSAY Bk1942 Amer. Pig Latin for ‘sap’
– a dullard; an oaf; a stupid person MUTT 20C US sl.
– a dullard; a party-spoiler; a bore DILL Bk1969 US Air Force Academy cadets’ sl.
– a dullard; a pig-headed fellow, a blockhead, a fool PIG-SCONCE 1631
– a dullard; a silly, dull fellow; a foolish person; a simpleton; an oaf NOCKY a1700 obs. rare exc. Eng. dial.
– a dullard; a simpleton; a rustic, a yokel BACON-BONCE 1958 UK sl.
– a dullard; a slow-witted person ZOMBIE 1936 sl.
– a dullard; a stupid bungler ADDLE-COVE 1580 
– a dullard; a stupid bungler; a weak, silly person; a foolish person ADDLE-PATE 1601 
– a dullard; a stupid fellow, a fool, a simpleton DASIBERD c1400 obs.
– a dullard; a stupid person TROLL 1970s US Army sl.
– a dull, boring person BIND Bk1958 Eng. sl. 
– a dull, boring person NUDNIK Brit. sl.
– a dull, boring, or uninteresting youth or man, esp. if tall BIG DRINK OF WATER Bk1975 Amer. sl.
– a dull, boring person who leads an inactive, undemanding, and monotonous life VEGETABLE 1641 sl.
– a dull, boring, thus socially unacceptable person ZONKO 1975 US college sl. 
– a dull companion LOAD Bk1966 US students’ sl.
– a dull, foolish, or gullible person; a country bumpkin; a rustic MOEGIE;  MOEGOE;  MOGGOE;  MOGO 1953 S. Afr. colloq., derogatory
– a dull, foolish person; an undesirable person LUNCHBAG 1950s US college sl.
– a dull, foolish person; an undesirable person LUNCHBOX 1950s US college sl.
– a dull, foolish person; an undesirable person LUNCHBUCKET 1950s US college sl.
– a dull, foolish person; an undesirable person LUNCHPAIL 1950s US college sl.
– a dull, foolish person; an undesirable person LUNCHSACK 1950s US college sl.
– a dull, heavy, inactive fellow DRUMBELO 19C Eng. dial.
– a dull, heavy lummox; a stupid oaf DUMB-DUMB;  DUM-DUM M20 US sl.
– a dull, heavy person LUMP 1597
– a dull, heavy person; a country bumpkin; a clown, a lout, a boor; a blundering fool LOB-COAT 1604 obs.
– a dull, ignorant person; a fool, a stupid or silly person; a blockhead, a simpleton MOME 1550 obs. rare
– a dull, inactive person; an inert or sluggish person; a worn-out person or horse DRUMBLE 1575 obs. exc. Eng. dial.
– a dull, inactive, stupid, or ineffectual person; a simpleton MOPUS a1635 obs. exc. Eng. dial.
– a dull, ineffectual, or insignificant person; a jerk GINK 1906 sl.
– a dull, lifeless person BLUNK Bk1911 Sc.
– a dull, listless, dreamy fellow; one not over-bright in intellect MOPY 1870 Sc.
– a dull lout, a sluggish fellow, an oaf BOWBERT 1513 Sc. obs.
– a dull, oafish, if muscular person BUNK 1910s US sl.
– a dull or commonplace person; a plodder, a person who works slowly and laboriously PLODDALL 1618 obs. rare
– a dull or conventional person DULLHEAD 1971 US sl.
– a dull or inconsequential person; an idiot, a fool; someone who has nothing but air, and no brains AIRBALL 1984 US sl.
– a dull or insignificant person; an objectionable or unpleasant person URIAH HEEP 1992 UK rhyming sl. for ‘creep’ 
– a dull or lifeless person STODGER 1905 colloq.
– a dull or stupid fellow; one who makes blunders BONE-TOP 1919 Amer. dial.
– a dull or stupid person DULLY 1883 colloq.
– a dull or stupid person; a fool DUMB CLUCK 1929 sl., orig. US
– a dull or stupid person; one slow of comprehension DOWBART a1513 Sc. & Eng. dial.
– a dull or stupid person; one slow of comprehension DULBERT a1513 Sc. & Eng. dial.
– a dull or stupid person; used humorously as a proper name DULMAN 1615 obs.
– a dull or unintelligent person ZERK Bk1971 US students’ sl.
– a dull person DROOG 1990s sl.
– a dull person DROOGIE 1990s sl.
– a dull person; a dolt HUMP 1963 US sl.
– a dull person; a stupid person DIM BULB Bk2006 US sl.
– a dull person; one who seems to be unintelligent TWIMBLE Bk1971 US students’ sl.
– a dull person or subject STODGE 1922 colloq.
– a dull, plain, and drab person SQUARE BISCUIT Bk2007 US sl.
– a dull, stupid fellow BLUMF Bk1911 Sc.
– a dull, stupid fellow DEAF-HEAD Bk1900 Eng. dial.
– a dull, stupid fellow HEAVYHEAD 1399 rare
– a dull, stupid fellow ZAWKER Bk1882 Eng. dial.
– a dull, stupid fellow; a dolt MALT-HORSE 1590 obs.
– a dull, stupid fellow; a fool JACK LANTERN 1896 Amer. dial.
– a dull, stupid, foolish person GOOK;  GOUK 1910s sl., orig. US
– a dull, stupid, inactive person; a silly person CABBAGE 1887 Amer. sl., derogatory
– a dull, stupid male PALOOKA 1920 sl., orig. US 
– a dull, stupid, or clumsy person; a silly, stammering fellow who tries to explain himself an fails GANSH 1880 Sc.
– a dull, stupid, or foolish person FRIP 1970 US college sl.
– a dull, stupid person CHICKEN-HEAD 1919 Amer. dial.
– a dull, stupid person DEAD MEAT 1980s sl.
– a dull, stupid person DOWFART E18 Sc. arch.
– a dull, stupid person GONK 1966 Amer. dial.
– a dull, stupid person GOOBERHEAD 1970 Amer. dial.
– a dull, stupid person GRUNT 1968 Amer. dial.
– a dull, stupid person GUNK 1966 Amer. dial.
– a dull, stupid person HAYSEED 1965 Amer. dial.
– a dull, stupid person LOG OF WOOD M19 Aust. sl.
– a dull, stupid person MENSO Bk1970 US high school sl.
– a dull, stupid person NIMWIT 1968 Amer. dial.
– a dull, stupid person SACK 1835 Sc.
– a dull, stupid person; a blockhead; an oaf HAMMER-HEAD 1532 obs.
– a dull, stupid person; a crazy person LOLO 1938 Amer. dial.
– a dull, stupid person; a dumb person DUMMEL 1570
– a dull, stupid person; a fool LUNCH 1960s US college sl.
– a dull, stupid person; a fool LUNCHIE 1960s US college sl.
– a dull, stupid person; a fool NAILHEAD 1948 Amer. sl.
– a dull, stupid person; a fool; a blockhead, a dunce, an idiot HOBBIL;  HOBBLE 1740 Sc. & Eng. dial.
– a dull, stupid person; a fool; a dolt; an idiot LABRICK 1889 Amer. sl.
– a dull, stupid person; a fool; a dolt; an idiot LAVERICK 1895 Amer. dial.
– a dull, stupid person; a fool; an oaf BEAN-HEAD 1917 Amer. sl. 
– a dull, stupid person; a fool, an oaf JARHEAD 1969 Amer. dial., derogatory
– a dull, stupid person; a fool; an oaf; an odd, giddy person who hears bells; a silly or light-headed person DING-A-LING 1935 US sl.
– a dull, stupid person; a fool; an oaf; a silly or light-headed person DINGDONG 1968 Amer. dial.
– a dull, stupid person; a fool; a silly or light-headed person DINGBAT 1915  Amer. dial.
– a dull, stupid person; a fool, a simpleton OMADHAUN 1818 Ireland
– a dull, stupid person; a fool, a simpleton; a dunce DOOBIE 19C Sc.
– a dull, stupid person; a fool, a simpleton; a gawky person GANDER 1553
– a dull, stupid person; a fool, a simpleton, an oaf; a dim-witted or backward person SIMP c1910 sl., orig. US
– a dull, stupid person; a foolish, giddy person; a silly, light-headed person FEATHER-BRAIN 1839
– a dull, stupid person; a naive or inexperienced person; a greenhorn; a simpleton GREENY 1848 Amer. dial.
– a dull, stupid person; an idiot CAPON 1542
– a dull, stupid person; an inept person JAG-OFF 1968 Amer. dial.
– a dull, stupid person; an oaf; one who is as alert as a real sausage SAUSAGE Bk1975 Amer. sl. 
– a dull, stupid person; an uninteresting person, a bore MUTTON-HEAD 1825
– a dull, stupid person; a pest JEFF 1930s sl.
– a dull, stupid person; a queer, awkward, or disagreeable person DODO 1924 Amer. dial.
– a dull, stupid person; a rustic, a dolt ZEKE 1970 Amer. dial.
– a dull, stupid person; a rustic or countrified person JAY 1890 Amer. dial.
– a dull, stupid person; a rustic or countrified person JAYBIRD 1886 Amer. dial.
– a dull, stupid person; a rustic or countrified person JAYHAWK 1907 Amer. dial.
– a dull, stupid person; a rustic or countrified person JAYHAWKER 1911 Amer. dial.
– a dull, stupid person; a rustic or countrified person WAHOO 1882 Amer. dial.
– a dull, stupid person, a simpleton, a fool DAWKIN 1565 Eng. dial.
– a dull, stupid, slow person; a character, always used in a bad sense EVEN 1885 Eng. dial.
– a dull, stupid, sluggish person; a country bumpkin; a lout, a boor; a clumsy, lubberly fellow LOBCOCK a1553 obs. exc. Eng. dial.
– a dull, tedious person, esp. one out of touch with current fashions GUMBY 1970s Can. teen sl.
– a dull, thick-witted obstinate person; a stupid person; one who has a head like a ram RAM-HEAD 1605 obs.
– a dull, unfashionable person SAD 2001 sl.
– a dull, uninformed or obnoxious person; a person who is old-fashioned or unappealing MELVIN 1954 Amer. sl.
– a dull, uninteresting girl or woman; a stupid, boring woman ZELDA 1960 US sl.
– a dull, uninteresting, or boring youth or man, esp. if tall BIG DRINK OF WATER Bk1975 US sl.
– a dull, uninteresting or stupid person WOMBAT 1905 Aust. sl.
– a dull, unpleasant, or insignificant person NERD;  NURD 1950s sl., orig. US
– a dull, unpolished person, usually a male; an oaf or dolt; a fool ZHLUB 1950 US sl.
– a dull, unresponsive person; a blockhead; a dolt CLOD 1607 colloq.
– a dull, witless fellow NOAH’S ARK 1941 Aust. rhyming sl. for ‘nark’
– a dull-witted or offensive old person, esp. a man GEEZER 1885 sl.
– a dull-witted or offensive old person, esp. a man GEEZLE 1954 US sl.
– a dull-witted or offensive old person, usually a man; an odd or unusual fellow GEEZ 1977 US sl.
– a dull-witted or unpleasant person DUMBHEAD 1960 Amer. dial., usually derogatory
– a dull-witted or unpleasant person PEAHEAD 1960 Amer. dial., usually derogatory
– a dull-witted or unpleasant person PUDDINGHEAD 1894 Amer. dial., usually derogatory
– a dull-witted person; a dolt; a scholastical pedant DORBEL 1593 obs.
– a dull-witted person; a fool; a blockhead; a dunce; a dolt; a stupid fellow NUMBSKULL;  NUMSKULL 1697
– a dull-witted person, a stupid person LUMPHEAD 1969 Amer. dial.
– a dull-witted, stupid person; a lout BOZO 1966 Amer. dial.
– a dull young man; an awkward girl COW Bk1913-17 Amer. dial.
– a heavy dullard; an oaf DUMB OX 20C US colloq.
– an absolute dullard; a lazy or stupid person; a boring or feeble person DEADASS 1959 Amer. sl.
– a person who impresses people as being dull DOUCHE BAG Bk1970 US students’ sl.
– a very dull person; a person holding very traditional or conservative views MOULDY FIG 1945 US colloq.

– said of a dull-witted person HE WOULDN’T SHOUT IN A SHARK ATTACK Bk1999 Aust. sl.
– said of a dull-witted person IF HIS BRAINS WERE DYNAMITE HE COULDN’T BLOW HIS HAT OFF Bk1999 Aust. sl.
– used to indicate that a person is mentally dull or feeble-minded HIS BREAD IS NOT DONE 1940 Amer. dial.
– to be or make dull or sluggish DOWF E19 Sc. & N. Eng. dial.
– to be very dull, brainless, or stupid BE ON THE WRONG SIDE OF THE HEDGE WHEN THE BRAINS WERE GIVEN AWAY c1810
– to dull or deaden NARCOTIZE 1864
– to free from dullness or stupidity UNBESOT 1603 rare
– to render dull or stupid EFFATUATE 1630 obs.

DULL (not bright) – ADJECTIVES
– dull, dim; lacking brightness DUMB 1720 obs.
– dull, faded FADEY; FADY 1928 Amer. dial.
– dull, gloomy, dark HEAVISOME 1435 obs. exc. Eng. dial.
– of a dull, undecided colour DUNDUCKITY 19C Eng. dial.

DULL (not bright) – VERBS
– to make dull or dim in colour; to deaden DOR 1601 obs.

– duly, usefully, profitably; necessarily BEHOVEFULLY 1443 obs.