stupid foolish mad foolish absurd crazy lunatic idiotic irrational preposterous looney whacky dumb zany wacky nutty idiot uncomplicated loony nonsensical idiotical unreasonable kooky asinine weak daft unwise preposterous sluggish 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 half-baked tomfool bubbleheaded illogical lunkheaded featherheaded clueless thoughtless 50 percent-witted dense imbecile imbecilic dopey ludicrous dull unreasoned unintelligent dorky senseless dim obtuse feebleminded brain-useless vacuous lamebrain doltish opaque thickheaded thick 헬스케어 invalid laughable pinheaded comfortable fallacious dunderheaded farcical oafish nonrational dopy softheaded lamebrained unsound surd knuckleheaded clownish empty-headed dim-witted gormless chuckleheaded airheaded notional sluggish-witted ill-recommended boobish buffoonish chowderheaded birdbrained unconsidered
crazier; craziest Britannica Dictionary definition of CRAZY [also far more crazy; most crazy] 1 : not sane: such as a usually offensive : owning or exhibiting significant mental illness a healthcare facility for crazy
You need to use it to signify not reasonable a crazy concept . You can even utilize it to necessarily mean very angry, really enthusiastic or quite energized: She'll go crazy if she finds out. The crowd went crazy.