dumb dense obtuse unintelligent boneheaded simple thickheaded simpleminded doltish blockheaded stupid witless imbecilic dim brainless mindless thick dopey senseless moronic gormless dunderheaded pinheaded dof foolish daft silly idiotic asinine cretinous inane vacuous dull crazy bovine dippy fatuous blockish unsmart oafish dotish imbecile unthinking slow dorky airheaded dopy bonehead opaque dozy soft glaikit insensitive stolid unperceptive unimaginative blind uncomprehending imperceptive nonsensical pointless braindead ridiculous absurd preposterous ludicrous lunatic insane unresponsive limited damfool divvy irresponsible ignorant naive vapid goofy feebleminded gullible unreasoning cloddish deficient barmy wooden unwise dotty nutty daffy harebrained mad wacky cuckoo crackpot tomfool loony inept kooky sappy zany jerky