Silly foolish mad foolish absurd insane lunatic idiotic irrational preposterous looney whacky dumb zany wacky nutty idiot very simple loony nonsensical idiotical unreasonable kooky asinine weak daft unwise preposterous slow cuckoo fatuous dippy jerky senseless daffy sappy out to lunch screwball harebrained dotty witless inept simpleminded brainless weak-minded crackpot unreasoning kookie moronic balmy cockeyed fifty percent-baked tomfool bubbleheaded illogical lunkheaded featherheaded clueless thoughtless fifty percent-witted dense imbecile imbecilic dopey ludicrous boring unreasoned unintelligent dorky senseless dim obtuse feebleminded Mind-useless vacuous lamebrain doltish opaque thickheaded thick invalid laughable pinheaded gentle fallacious dunderheaded farcical oafish nonrational dopy softheaded lamebrained unsound surd knuckleheaded clownish empty-headed dim-witted gormless chuckleheaded airheaded notional sluggish-witted sick-recommended boobish buffoonish chowderheaded birdbrained unconsidered

crazier; craziest Britannica Dictionary definition of CRAZY [also a lot more crazy; most crazy] 1  : not sane: such as a  ordinarily offensive : owning or exhibiting extreme mental illness a healthcare facility for crazy

You should utilize it to mean not wise a crazy notion . It's also possible to utilize it to mean really indignant, incredibly enthusiastic or 무에타이 pretty excited: She'll go crazy if she finds out. The crowd went crazy.