CRAZY

adj. 1 mad, insane, demented, deranged, unbalanced, unhinged, lunatic, non compos mentis, daft, certifiable, mental, touched (in the head), out of one's mind or head, mad as a March hare or hatter, maddened, crazed, Colloq barmy or balmy, cuckoo, cracked, crackers, crack-brained, dotty, daffy, dippy, gaga, goofy, crackpot, loony, off one's rocker, have a screw loose, screwy, batty, bats, bats in the belfry, Brit barmy (in the crumpet), potty, bonkers, round the bend or twist, off one's chump, doolally, US off one's trolley, out of one's gourd, screwball, nuts, nutty (as a fruit cake); Slang bananas, US out to lunch, meshuga, flaky, flaked-out, (plumb) loco His wife thinks he's crazy to want to walk around the world 2 silly, absurd, foolish, nonsensical, inane, ridiculous, preposterous, laughable, risible, ludicrous, asinine, stupid, moronic, imbecile or imbecilic, idiotic, feeble-minded, hare-brained, Colloq crackpot Someone came up with a crazy idea of a square tennis ball to slow down the game 3 impractical, impracticable, unworkable, unsound, pointless, imprudent, rash, reckless, ill-considered Columbus' plan to sail round the world was thought to be crazy at the time 4 enthusiastic, eager, avid, zealous, keen, excited I'm really crazy about windsurfing 5 infatuated, keen on or about, wild, mad, Colloq dotty, US nuts, nutty; Slang US ape Marjorie, I'm absolutely crazy about you