dafl

adj

1. crazy, crazed, Sl. bughouse, Sl. kooky, Inf. potty, Sl. nuts, Inf. nutty, Inf. daffy; insane, mad, demented, lunatic, deranged; of unsound mind, Latin, non compos mentis; unbalanced, touched, Inf. half-baked, unhinged; not all there, not quite right, not right upstairs, Inf. mental, Inf. cracked; out of one's head, out of one's mind, mad as a hatter, mad as a March hare; maniacal, wild, raving, hysterical, frenzied, delirious, berserk; All Sl. balmy, dippy, batty, cuckoo, buggy, screwy, wacky, goofy, loony.

2. dazed, moonstruck, possessed, infatuated; peculiar, strange, odd, eccentric, pixilated; irrational, illogical, unreasonable; unreasoning, unthinking, incogitant, thoughtless.

3. simple-minded, simple, bird-brained, weak-minded, weak-headed, feeble-minded; harebrained, giddy, mercurial, reckless; absent-minded, scatterbrained, confused, bemused; featherheaded, featherbrained, rattleheaded, rattlebrained, light-minded, light-headed; empty, void, vacant, vacuous, blank, unoccupied.

4. addlepated, addleheaded, addlebrained, muddled, muddleheaded; dull, inexpressive, insensate, expressionless; stupid, Inf. dumb, Inf. dopey, empty-headed; dull-witted, Sl. dimwitted, slow-witted, half-witted, fat-witted, witless, unwitty; mindless, brainless, fatuitous; dense, thick, thickheaded, wooden-headed; obtuse, Inf. cretinous, Boeotian, stolid, oafish, cloddish, lumpish, blunt; blockheaded, dunderheaded, noodleheaded, boneheaded, thickskulled, blockish, doltish.

5. silly, absurd, inane, pointless, fatuous, foolish; nonsensical, senseless, crackbrained, Scot. doiled, Sl. cockeyed, Scot, and North Eng. glaikit; poppycockish, Sl. cockamamie, amphigoric; ridiculous, laughable, risible, derisible, ludicrous, Sl. for the birds; asinine, anserine, idiotic, Inf. moronic, imbecilic; childish, puerile, immature.