Reverse Dictionary: IDIOT

ADJECTIVES
► APARTMENTS-TO-LET weak-minded; idiotic → B1874 Eng. sl.
► ASSHOLINGEST most idiotic → 1972 Amer. sl.
► BABBLE half-witted; idiotic → 1835 Sc.
► BALMY soft, idiotic, weak-minded; insane → 1851 sl.
► BARMY ON THE CRUMPET crazy, wrong in the head, mad, idiotic, weak-minded → 1891 
► CAKEY silly, weak of intellect, idiotic → Bk1898 Eng. dial.
► CALUTED idiotic, stupid, dull of comprehension → Bk1898 Eng. dial.
► COLD idiotic, foolish → Bk1964 US students’ sl.
► DAFF stupid, dull, idiotic → Bk1900 Eng. dial.
► DIPPY foolish, simple-minded, idiotic, shallow-minded; infatuated, deeply in love; peculiar, mildly insane, crazy → 1899 US sl.
► DOOFLESS idiotic, stupid, dull → 1970s US sl.
► EASY feeble-minded, idiotic, silly → 1896 Eng. dial.
► FATUOUS that is in a state of dementia or imbecility; idiotic → 1773
► FUCKWIT idiotic; stupid →1979 sl., orig. Aust.
► FUCKWITTED idiotic; stupid →1973 sl., orig. Aust.
► GABY foolish, idiotic → 1874 Eng. dial.
► GAPING-MOUTHED gaping, foolish, idiotic → Bk1900 Eng. dial.  
► GAWBY foolish, idiotic; ill-mannered, uncouth → 1874 Eng. dial.
► GOFFENY foolish, idiotic → 1889 Eng. dial.
► GONE TO GOWINGS insane, idiotic → Bk1999 Sydney, Aust. sl.
► GYPED ► GYPIT silly, foolish, idiotic → 1804 Sc.
► IDIOTISH idiotic → 1559 obs.
► IDIOTLY idiotic → 1662 obs.
► INSANE idiotic, utterly senseless, irrational, obsessive → M19
► JERKY foolish, idiotic → 2009 Amer. sl. (Bk.)
► LACK-WIT foolish, idiotic, or simple-minded → 1735
► LUNATIC madly foolish, frantic, idiotic → 1571
► LUNK-HEADED idiotic, senseless → 1945 US Western sl. (Bk.)
► POINTY-HEADED stupid; idiotic → 1968 Amer. sl.
► RADGIFIED idiotic, very silly → 20C UK sl.
► SART-AND-FAIR stupid, senseless, idiotic → 1746 Eng. dial.
► SO WET YOU COULD SHOOT DUCKS OFF HIM idiotic → Bk1999 Aust. sl.
► STUPE stupid, foolish, idiotic → 1866 colloq.
► THICKHEAD idiotic, foolish, stupid → 1999 UK sl.
► YAPPIFIED idiotic → 1979 UK sl.
► YAPPY foolish, soft; idiotic → M19 sl.
► ZATENFARE stupid, senseless, idiotic → 1746 Eng. dial.

ADVERBS
► DAFFY-LIKE foolishly, like an idiot → Bk1900 Eng. dial. 

INTERJECTIONS
► YOU DER! you idiot! → Bk1999 Aust. sl.

NOUNS
► DUNCERY the behaviour, etc., of a person who is slow to learn or understand; stupidity, idiocy → 1615
► DUNCICALITY the state of being a dunce; stupidity, idiocy → 1790
► DUNCISHNESS the state of being a dunce; stupidity, idiocy → 1805
► FATUISM idiocy, mental imbecility, dementia → 1884
► FATUITY idiocy, mental imbecility, dementia → 1621-51 
► GABY folly, idiocy → B1900 Eng. dial.
► IDIOTACY idiocy → 1583 obs.
► IDIOTRY idiocy, folly → 1887 Sc.
► INNOCENCE idiocy, weakness of intellect → 1862 Eng. dial.
► WOOBLES feeblemindedness, foolishness, idiocy → 1933 Amer. dial.

NOUNS – PERSON
► AIRBALL an idiot, a fool; someone who has nothing but air, and no brains → 1980s US sl.
► ALEC ► ALECK ► ALICK an idiot → 1919 Aust. sl.
► APEHEAD a fool, an idiot → M19 US sl.
► APPIEGEST a fool, a simpleton, an idiot → 1929 Sc.
► ASSHEAD a stupid or foolish person; an idiot → a1500 colloq.
► BABBO an idiot; a useless underling → Bk1997 mobsters’ usage
► BAKE a fool, an idiot → 1860 US sl.
► BAKEBRAIN someone with limited or damaged mental faculties; a fool, an idiot; a stupid person → 1949 US sl., derogatory
► BAKEHEAD a fool, an idiot; a stupid person; an insane or crazy person  → 1949 US sl.
► BALONEY an oafish, stupid, or clumsy person; an idiot; a worthless person → 1920 US sl.
► BALONEY-BENDER one who habitually flatters or talks nonsense; an idiot → 1926 Amer. sl.
► BANANAHEAD a simpleton, a fool, an idiot, a stupid person → 1949 US sl.
► BARNEY a stupid man; an idiot → Bk1993 surfing sl.
► BAVIAN a fool, an idiot → 1797 derogatory
► BEALS a fool, an idiot, an unsophisticated person; a displeasing person → a2001 sl. 
► BESSY an ill-mannered, romping, or bad-tempered woman or girl; a light-headed girl; an idiot → Bk1898 Sc. & Eng. dial.
► BIG BLAH a fool; an idiot → 1927 US sl.
► BIG BOY a foolish, reckless, devil-may-care young man; a loveable idiot → 1920s US Black sl.
► BLAH a fool, an idiot → 1923 US sl.
► BLOCK a fool, an idiot, a stupid person → M16 sl.
► BOGAN a fool, an idiot → Aust. sl.
► BONEHEAD an idiot → 1908 US sl.
► BURG a fool, an idiot; an unpleasant person → 1980s S. Afr.
► CAKEHEAD an idiot; a fool → 1998 UK sl.
► CAPON an idiot, a dull, stupid person; a term of reproach → 1542
► CHUCKLEHEAD a blockhead, an idiot → 1731
► CHUMP-HEAD a fool, an idiot → 1854 Eng. dial.
► COUGH DROP an idiotic person → 1895 sl.
► CRATEHEAD a fool, an idiot → Bk2004 sl.
► CRETIN an extremely foolish or stupid person; an idiot, a moron → 1884
► CRUD an  idiot → Bk1970 US sl.
► D.A. a fool, an idiot (Dumb-Ass) → 1970s US students’ sl.
► DAFT-HEAD a silly fellow; an idiot; a fool → Bk1873 Eng. dial.
► DAFTIE ► DAFTY an idiot, an imbecile; a madman → 1868 Sc. & N. Eng. dial.
► DALCOP an idiot → 1858 Eng. dial.
► DERRO an idiot; a stupid person; one who has done something ridiculous → 2012 Aust. sl. (Bk.)
► DICKEY-DIDO ► DICKY-DIDO an idiot; a fool→ 19C Brit. sl.
► DIMELOW ► DINELO► DINELOW a fool, an idiot → 1900 UK sl.
► DIPSTICK an inept fool; an idiot; a jerk; a stupid or contemptible person; an oaf → 1963 US sl.
► DIZZARD a foolish, stupid, or silly fellow; an idiot, a blockhead; a weak-minded person → 1547 obs.
► DOAD ► DOADY a fool, a simpleton, an idiot → 1873 Eng. dial.
► DOITARD a simpleton, a fool, an idiot → 1860 Eng. dial.
► DOITY a fool, simpleton, idiot → 19C Eng. dial.
► DOOF a bumbling fool; an idiot → Bk1971 US students’ sl.
► DORKUS MAXIMUS a complete idiot → 2009 Amer. sl. (Bk.)
► DOUGHBAKE a stupid or foolish person; a simpleton, an idiot → 1895 Eng. dial.
► DOUGHBALL a stupid or foolish person; an idiot → 1983 colloq., chiefly Sc.
► DOUGH CAKE a fool, an idiot → a1794 Eng. dial. obs.
► DOUGH-HEAD a fool, a stupid person; an idiot → 1807 colloq., orig. & chiefly US
► DRONGO an idiot, a simpleton, a stupid person → 1953 Aust. sl.
► DUMB BASTARD an idiot; a person who is both stupid and obnoxious → 2009 Amer. sl. (Bk.)
► DUMB-BUTT an idiot; a stupid and obnoxious person → 2009 Amer. sl. (Bk.)
► DUMB-DUMB a foolish person, an idiot → 1919 colloq.
► DUNCEHEAD a stupid, inept, or dim-witted person; an idiot → 1749 derogatory or depreciative usage
► DUNDERHEAD a stupid or slow-witted person; an idiot, a fool → 1630 depreciative usage
► DUNNY a stupid, dim-witted person; an idiot → 1709 obs.
► EDDY an idiot → Bk1900 Eng. dial.
► EGGHEAD a fool, a dolt, an idiot → 1941 US sl.
► FANNY a fool, an idiot → 2001 sl.
► FARTKNOCKER one who does not know what they are talking about, an idiot → 1950s US sl.
► FAT-BRAIN a fool, an idiot; often used affectionately as well as derogatorily → L16 sl.
► FAT-HEAD a fool, an idiot; often used affectionately as well as derogatorily → 1842 sl.
► FRUIT FLY a crazy, eccentric, or silly person; an idiot → 1987 US sl.
► FUCK NUT an idiot → Bk2006 US sl.
► FUCKWIT a foolish person, a stupid or contemptible person; an idiot → 1969 sl., orig. Aust.
► GABBY a stupid or foolish person; an idiot; a simpleton → 1926 US sl.
► GABEY ► GABY a stupid or foolish person; an idiot; a fool → 1746 colloq. & Eng. dial.
► GADAHA a fool, an idiot → 1964 W. Indies
► GADGIE a fool, an idiot → 1985 Sc. sl.
► GALAH a loud-mouthed idiot → 1945 Aust. sl.
► GAMFREL ► GAMPHREL ► GAMPHRELL a stupid or foolish person; a blockhead, an idiot; a forward, presumptuous person → 1729 Sc.
► GAPER a dolt, an idiot → 1966 US sl.
► GAPING ASSHOLE a dolt, an idiot → 1966 US sl.
► GARBANZO ► GARBONZO a crazy idiot → 1982 US sl.
► GAUKIE ► GAWKEE an awkward, clumsy person; a fool; a simpleton; an idiot → 1726 Sc.
► GAUVING an idiot; a half-witted person → Bk1900 Eng. dial.
► GAVY a silly person, or half idiot → Bk1886 Eng. dial.
► GAWBY a stupid or foolish person; an idiot; a blockhead; a simpleton; a lout → 1746 colloq. & Eng. dial.
a loutish idiotic person → Bk1891 Eng. dial.
► GEIT a foolish fellow, an idiot; a madman → Bk1900 Sc.
► GET ► GETT ► GHET an idiot; a fool; an unpleasant or despicable person; a term of abuse → 1931 UK sl.
► GETSIE an idiot; a fool; an unpleasant person; a term of abuse → 1935 UK sl.
► GIG a fool, a simpleton, an idiot, a stupid person; a trifling, silly, flighty fellow → 1685 Eng. dial.
► GIG APE a fool; an idiot → 1948 Aust. sl.
► GIGHEAD a fool, an idiot → 1940s Aust. sl.
► GILLIGAN a hapless, socially inept person; a moron; an idiot  → 1991 US sl.
► GILLY a foolish or silly person; a simpleton; an idiot → 1770
► GIPE ► GYPE a fool, an idiot → 1825 Sc.
► GIT a fool, an idiot, a dolt; a worthless person, a good-for-nothing → 1858
► GITE a foolish fellow, an idiot; a madman → Bk1900 Sc.
► GLEEF an idiot → 1960s US sl.
► GOCKEY an idiot → 2012 Eng. dial. (Bk.)
► GOD’S CHILD an idiot → 1880 Eng. dial.
► GOM a foolish, awkward person; a simpleton; an idiot → 1996 Ireland
► GOMMOCK a fool, an idiot, a simpleton → 1843 Sc. & Ireland
► GONK a fool; an idiot → 2003 UK teen sl.
► GOOBER an idiot, a fool; an incompetent, a country bumpkin → M19 sl.
► GOOFUS ► GOOVUS an idiot → 1917 US sl.
► GOOSECAP a silly fellow; a stupid, foolish person; a simpleton; an idiot; a giddy or flighty young girl → 1589 obs. exc. Eng. dial.
► GUMP a stupid, foolish, or awkward person; an idiot; a senseless person; a dolt → 1825 Amer. dial.
► GUMP-HEAD a stupid, foolish, or awkward person; an idiot; a senseless person; a dolt → 1916 Amer. dial.
► GUMPY a stupid, foolish, or awkward person; an idiot; a senseless person; a dolt → 1892 Amer. dial.
► HALF-WIT a weak-minded or idiotic person; also, a dolt; a blockhead → 1755
► HANS WURST an idiot → 1975 Amer. dial.
► HARRY HUGGINS a fool, an idiot → 1992 UK rhyming sl. for ‘muggins’
► HEAD-CASE an idiot → 1983 euphemism
► HEAD-THE-BALL a foolish or silly person; an idiot; also, a crazy person, esp. one who is violent or unpredictable → 1958 colloq., chiefly Irish & Sc.
► HOBALL a clown, a fool, a dolt, an idiot → a1553 obs.
► HOBBIL ► HOBBLE a fool, a dull, stupid person; a blockhead, a dunce, an idiot → 1740 Sc. & Eng. dial.
► HOB-GOB a fool, an idiot; an awkward, uncouth person → B1900 Eng. dial.
► HUMMER an idiot; a backward person → Bk1970 US students’ sl.
► IDIOTA an idiot → 1624 obs.
► IDIWUT an idiot → 1826 Sc.
► IDJIT an idiot → Bk1997 Amer. dial.
► IDJUT an idiot → Bk2002 Aust. sl. 
► INNOCENT a simpleton, an idiot → 1598
► ISRAEL a fool, an idiot → Bk1902 Eng. dial.
► JACKASS a foolish or stupid person; an idiot, a dolt → 1756
► JACK-FOOL a thundering idiot → 1383 sl.
► JACK-OFF FREAK an idiot → Bk1972 homosexual sl.
► JACK SHIT an idiot → Vietnam war usage 
► JIMCRACK a fool, an idiot, a half-witted person → 1908 Amer. dial.
► KLUTZ an oaf; a clod or a bungler; an idiot; an awkward, stupid person → M20 US sl.
► LABRICK a fool; a dolt; an idiot; a dull, stupid person; a greenhorn; a stranger; a naive or foolish person; often used as a mild term of abuse → 1889 Amer. sl.
► LAME a person who is ‘lame’; a fool, an idiot; an unsophisticated person; one who does not fir in with a particular social group  → 1958 US sl., chiefly Black usage
► LAMEBRAIN a fool, an idiot → 1919 US sl.
► LAME-O a fool; an idiot; an unsophisticated person → 1977 US college sl.
► LAMER a person who is ‘lame’; a fool, an idiot; an unsophisticated person → 1961 US sl.
► LARDHEAD a stupid person; an idiot → 1936 Amer. sl.
► LAVERICK a fool; a dolt; an idiot; a dull, stupid person; a greenhorn; a naive person; a stranger; often used as a mild term of abuse → 1895 Amer. dial.
► LEADHEAD a blockhead, an idiot → 1952 Amer. sl.
► LOLLYPOT a term of abuse; an idiot, a booby; a lazy lubber → 1746 Eng. dial.
► LUNKHEAD an absolute fool; an idiot; an incompetent → M19 sl., orig. US
► MACO a fool, an idiot → 20C W. Indies sl.
► MAGHNOON a fool; a dolt; an idiot → L19 among troops in Egypt
► MAISLIN ► MAZLIN a fool, a simpleton, an idiot → 1781 Eng. dial.
► MAISLYKIN ► MAZLEKIN a fool, a simpleton, an idiot → 1781 Eng. dial.
► MAKO a fool, an idiot → 20C W. Indies sl.
► MAZY-JACK a fool, an idiot; a parish fool → 1876 Eng. dial.
► MENTAL GIANT a fool, an idiot → 1980s US campus sl.
► MENTAL HERNIA a fool; an idiot; an oaf; a stupid person → 1970 Amer. sl.
► MOBY DICK a fool, an idiot → Bk2004 Brit. rhyming sl. for ‘prick’
► MOISEY ► MOISY a person of soft intellect, an idiot, a fool → Bk1905 Eng. dial.
► MOLLYHAWK a fool, a simpleton, an idiot → 1900 sl.
► MOLLYHEAD a fool; a simpleton; an idiot  → 1902 sl.
► MOMO a stupid or useless person; an idiot; a blockhead → 1953 Amer. sl.
► MOMPARA an incompetent person; a fool; an idiot; also used affectionately, and as a form of address → 1930 S. Afr. colloq.
► MONG an idiot; a fool; a mentally slow or backward person → 1980 Brit. colloq., offensive
► MONGO an idiot; a weirdo → 1975 Amer. sl.
► MONGY an idiot; a fool; a mentally slow or backward person → 2000 Brit. colloq., offensive
► MOONCALF a born fool; a congenital idiot; a simpleton → 1627 colloq.
► MOONLING  a simpleton, a fool, an idiot, a silly fellow, a lunatic → 1631 obs.
► MOOSIE ► MOOSY ► MOOZY a person of soft intellect, an idiot, a fool, a blockhead, a stupid person → Bk1905 Eng. dial.
► MOP-STICK a stupid person; a fool; an idiot → 1882 sl. obs.
► MORON a stupid or slow-witted person; a fool; an idiot; a feeble-minded person; a dunce → 1917 colloq., orig. US
► MOSEY ► MOSY ► MOUZY ► MOZEY ► MOZIE ► MOZY a person of soft intellect; an idiot, a fool → 1824 Sc.& Eng. dial. 
► MOTORHEAD a dolt, an idiot → 1973 Amer. sl.
► MUFFIN-HEAD a fool, an idiot → 1892
► MUMMY an idiot → Bk1913-17 Amer. dial.
► MUPPET an incompetent or ineffectual person; an idiot; an enthusiastic but inept person; a person prone to mishaps through naivety → 1989 sl.
► MUSH a fool; an idiot; a weak-minded person → 1906 US sl.
► MUSH-FACE a fool; a sentimental idiot → 1920s sl.
► NAFFHEAD a stupid person, a blockhead, a simpleton, an idiot, a dolt → 1796 Eng. dial.
► NAFFIN a simpleton; a blockhead; an idiot → 1790 Eng. dial.
► NAFFLIN one almost an idiot → 1781 Eng. dial.
► NAFFY a soft-headed person; a simpleton; a blockhead; an idiot → Bk1855 Eng. dial. 
► NANA ► NARNA a fool, an idiot, an incompetent person → 1965 sl.
► NATURAL a half-witted person; one naturally deficient in intellect; an idiot; a simpleton → 1533
► NATURE-FOOL a born idiot; a simpleton → 1893 Eng. dial.
► NED-FOOL a noisy idiot → 1600 sl.
► NENA a fool, an idiot, a ninny → 1870 Eng. dial.
► NIDDY-NODDY a fool, idiot, or simpleton → 1889 Eng. dial.
► NIDDYWIT a simpleton, an idiot → B1900 Eng. dial.
► NIDGET ► NIGIT an idiot → 1623 sl.
► NIGGET a fool, simpleton, idiot → B1900 obs.
► NIGMENOG ► NIMENOG a fool, an idiot → 1698 sl.
► NINGNONG a fool, an idiot, a stupid person → 1832
► NIT-HEAD an idiot, a fool → 1999 sl.
► NO NECK a weakling, a coward; an idiot → 1989 sl.
► NODDY-PATE a simpleton, an idiot, a fool, an oaf → 1660
► NONG an idiot, a fool → 1953 Aust. sl.
► NONG-NONG an idiot, a fool → 1959 Aust. sl.
► NOSEBLEED an idiot, esp. a weakling → 1954 sl.
► NOWT-HEAD a fool, a blockhead, an idiot → 1862 Sc. & Eng. dial.
► NUGGET a fool, an idiot → 1989 US students’ sl.
► NUMBNUTS an idiot, a fool → 1969 US sl.
► NUMPTY a fool; an idiot → 1985 Brit. sl.
► NUTBALL an idiot → 1965 US sl.
► NYAMS a weakling, a useless idiot → 1966  W. Indies sl.
► OAF a half-wit; a simpleton; a fool; a stupid fellow; a blockhead; an idiot; a dolt; an awkward, blundering lout; the clown of a circus → 1638
► OANSHACH ► OASHACH a foolish person, an idiot → 1950 Sc.
► ONION an idiot → 1894 US sl.
► ONIONHEAD a fool, an idiot → 1928 US sl.
► PASH-HEAD a simpleton, an idiot; a soft-headed person → 1890 Eng. dial.
► PIE EATER an unimportant or contemptible person; a fool, an idiot → 1975 Aust. sl., derogatory
► PILLOCK an idiot → 2012 Brit. sl. (Bk.)
► PLONKER an idiot → 2012 Brit. sl. (Bk.)
► POGGLE a crazy or foolish person; an idiot → E19 Indian obs.
► PORGLY a madman; an idiot; a dolt → Bk1892 Anglo-Indian sl.
► PRANNET a fool, an idiot → 1970s sl.
► PRICKER a fool, an idiot, an incompetent person → 1920s sl.
► PUGGLE a crazy or foolish person; an idiot → E19 Indian obs.
► PUGGLY a madman; an idiot; a dolt → Bk1892 Anglo-Indian sl.
► RAAS ► RARSE ► RASS a contemptible person; an idiot → 1959 W. Indies & Black British sl., derogatory
► RAASHOLE ► RASSHOLE  a general term of abuse; a contemptible person; a great fool; an idiot → 1959 W. Indies & Black British sl.
► RADGE a mad or violent person; an idiot → 1995 orig. Eng. dial., now chiefly Sc. 
► RADGEPOT an idiot; a fool → 1979 UK sl.
► RANKER an absolute idiot → M19 sl.
► RIGHT NANA a complete idiot → 1671 sl.
► SALA an idiot → 2003 US sl.
► SAP a simpleton; a blockhead; a fool; a dunce; a dullard; an idiot → 1817 Sc. & Eng. dial.
► SILLY ASS an amiable, upper-class idiot
► SILLY BOLLOCK→ SILLY BOLLOCKS a contemptible fool; an idiot → 1999 UK sl.
► SPANNER a fool; a stupid person; an idiot → 1987 sl.
► SPANNER-HEAD a fool; a stupid person; an idiot → 1990 Aust. sl.
► SPARE an idiot; a boring person → 1991 Irish sl.
► SPAS  a spastic person; an ineffectual or incompetent person; a fool; an idiot; a stupid person; a clumsy, unattractive person → 1965 sl., derogatory
► SPASTIC one who is uncoordinated, ineffectual, or incompetent; a fool; an idiot; a stupid person; a clumsy, unattractive person → 1968 sl., offensive
► SPAZ ► SPAZZ a spastic person; an ineffectual, useless, or incompetent person; a fool; an idiot; a stupid person; a clumsy, unattractive person → 1965 sl., derogatory
► SPAZ-WIT a fool, an idiot, a stupid person .,..1998 UK sl.
► STUPEX a stupid person, a fool, an idiot – 1843 colloq.
► TAMEVATE a dope; an idiot → Bk1982 Jewish 
► THITER a foolish fellow; an idiot → Bk1905 Eng. dial.
► TRONK an idiot; a foolish person → 1970s UK teen sl.
► TRONK-HEAD an idiot; a foolish person → 1970s UK teen sl.
► TURKEY an idiot, a fool → Bk1995 US sl.
► TWALLY an idiot; a fool → 1996 Sc. sl.
► TWAT a contemptible or obnoxious person; a person who behaves in a stupid manner; a fool, an idiot → 1922 sl.
► TWIT a stupid, silly, or annoying person; a fool, an idiot → 1934 colloq., orig. & chiefly UK
► TWONK an idiot; a fool → 1981 UK colloq.
► UNFORTUNATE an idiot → 1881 Ireland
► UTZPAY a fool, an idiot → 1930s Pig Latin for ‘putz’ 
► WAD a fool, an idiot, an unpleasant person → 1900 sl., orig. US college usage
► WAD-WASTE a term of abuse; a fool, an idiot, an unpleasant person → 1981 sl., orig. US college
► WAG an idiot; a moron → Bk1994 US surfing sl. 
► WALLY an idiot → Bk1999 Aust. sl.
► WANWIT a foolish, witless, or insane person; an idiot; a lunatic → 1837 colloq., arch.
► WAZZACK an idiot → 2012 Brit. sl. (Bk.)
► WILMA a female idiot → 1980s US sl. 
► WONKYBONCE an idiot; also, a nickname for a stupid, thick person → Bk2004 Brit. sl. 
► WOZZ a fool; an idiot → Brit. sl.
► WOZZLE a fool; an idiot → Brit. sl.
► YASHA an idiot; a fool; a dolt → Bk1972 homosexual sl.
► YAWNY an idiotic or senseless person; a fool; a simpleton; a dolt → Bk1887 Eng. dial.
► YOBBO a foolish, unsophisticated idiot → Bk1988 Aust. sl.
► YOMMER-HEAD a blockhead; an idiot → 1877 Eng. dial.
► YOTZ a fool, an idiot → 1983 US sl.
► YOYO an unpredictable or inconsistent person whose moods and actions go up and down; hence, a fool; an idiot, a dolt; a stupid person; an obnoxious person; an incompetent, or undesirable person; a jerk → 1959 US sl.
► YUCK an idiot → 1958 US sl.
► YUTZ a fool, an idiot; a simpleton; a failure → 1983 US sl.
► ZONK a fool; a dolt; an idiot → Bk1988 Aust. & NZ
► ZOTEY a fool; an idiot → Bk1855 Eng. dial.

VERBS
► BE SHORT OF A SHEET to be slightly crazy or idiotic → Bk1892 Aust. sl.
► HAVE A SHINGLE SHORT to be slightly crazy or idiotic → Bk1892 Aust. sl.
► IDIOTIZE to become idiotic or stupid → ? a1800