Reverse Dictionary – STUPID – NOUNS

– a mythical library of the stupidest things ever said FOOL FILE 1991 US sl.
– anything stupid, inferior, or futile TURKEY 1941 US sl.
– a personification of stupidity and incompetence P.O. PRUNE 1895 Royal Air Force sl.
– a stupid, dunce-like mind; a brainless cranium POINTED HEAD 1940s Amer. sl.
– a stupid job, task, or scheme FOOD FOR THE SQUIRRELS Bk1974 Amer. sl.
– a stupid, semi-imbecile manner QUADDLIN;  QUIDDLING Bk1905 Eng. dial.
– extreme stupidity ASS-FAULT 1990s US students’ sl.
– extreme stupidity or folly JACKASSERY 1833
– feigned stupidity NUT ROLE 1967 African-American sl.
– pure stupidity ASSISHNESS 2003 Trinidad and Tobago
– stupidity BEEF-WITTEDNESS 1863
– stupidity BOOBERY Bk1942 Amer. sl.
– stupidity BOOBISHNESS Bk1942 Amer. sl.
– stupidity CHUCKLEHEADEDNESS Bk1942 Amer. sl.
– stupidity CHUPIDNESS 20C W. Indies sl.
– stupidity DUMB ASS 1972 US sl.
– stupidity FAT BRAINS Bk1942 Amer. sl.
– stupidity GROUT-HEADRY 1600 obs.
– stupidity JINGLEBRAINS Bk1942 Amer. colloq.
– stupidity LAME BRAINS Bk1942 Amer. sl.
– stupidity MUSHBALL 1980s US sl.
– stupidity MUSHBRAIN 1980s US sl.
– stupidity MUZZINESS Bk1942 Amer. sl.
– stupidity NITWITTEDNESS Bk1942 Amer. sl.
– stupidity NITWITTISM Bk1942 Amer. sl.
– stupidity NUMSKULLEDNESS Bk1942 Amer. sl.
– stupidity NUMSKULLERY Bk1942 Amer. sl.
– stupidity NUMSKULLISM Bk1942 Amer. sl.
– stupidity SAPPINESS M19 US sl.
– stupidity SAWDUST BRAINS Bk1942 Amer. sl.
– stupidity SCRAMBLED BRAINS Bk1942 Amer. sl.
– stupidity TAIVERTNESS 1913 Sc.
– stupidity, besotted foolishness, infatuation; imbecility FATUOUSNESS 1874
– stupidity, confusion, muddle-headedness ADDLE-HEADEDNESS 1835
– stupidity, dullness, insensibility; obtuseness OBTUSITY 1823 
– stupidity, dullness of intellect SUMPHISHNESS 1846 Sc. & Eng. dial.
– stupidity, dullness; unenlivened condition DULLERY 1653
– stupidity, folly DAFF 1728 Sc. obs.
– stupidity, folly, silliness; infatuation FATUITY 1648
– stupidity, folly, silliness; infatuation FATUOSITY 1681 obs. rare
– stupidity, foolishness DUNDERHEADISM 1836
– stupidity, foolishness FANDANGLE 1940s W. Indies sl.
– stupidity; foolishness LEATHER-HEADEDNESS 1879 Amer. dial.
– stupidity, foolishness VAINNESS 1591 obs.
– stupidity, foolishness; action or behaviour characteristic of a jackass or fool JACKASSISM 1817
– stupidity, foolishness; pretense OKEY-DOKE 1969 sl., esp. African-American
– stupidity, foolishness, silliness DOTISHNESS 1598
– stupidity, foolishness, the quality of being a jackass or fool JACKASSNESS 1803
– stupidity, idiocy; behaviour or qualities characteristic of a person who is stupid or slow to learn or understand DUNCERY 1615
– stupidity, idiocy; the state of being a dunce DUNCICALITY 1790
– stupidity, idiocy, the state of being a dunce DUNCISHNESS 1805
– stupidity, incompetence MOPERY 1907 US sl.
– stupidity; inertness of understanding; dullness DASTARDNESS 1552 obs.
– stupidity; inertness or dullness of wit DASTARDLINESS 1553 obs.
– stupidity, irrationality, want of intelligence BESTIALITY c1374
– the reward of stupidity, slowness, or badness LEATHER MEDAL Bk1902 Eng. dial.
– wilful stupidity ARSENESS 20C W. Indies sl.