insane

adj

1. crazy, crazed, mad, demented, lunatic, deranged; of unsound mind, Latin, non compos mentis; psychotic, schizophrenic, Sl. schizo; daft, Inf. daffy, unbalanced, touched, Inf. unglued, Inf. half-baked, Brit. Sl. bonkers, unhinged, distracted; eccentric, flighty, odd, idiosyncratic, offbeat, queer, bizarre, Chiefly Brit. Inf. potty, Inf. dotty, Inf. crackpot; brainsick, Sl. kooky, Sl. meshuga; All Sl. balmy, dippy, batty, bats, cuckoo, buggy, bughouse, bugs, screwy, wacky, wacko, goofy, loony, squirrelly, bananas, nuts, nutty, nutty as a fruitcake, Section Eight.

2. out of one's head, out of one's mind, Scot. redwood, Sl. loco, mad as a hatter, mad as a March hare, far-gone, stark raving mad; not all there, not quite right, not right upstairs; Inf. out in left field, Sl. in outer space, Sl. in orbit, Inf. off the wall; Inf. cracked, Inf. mental, Sl. off one's rocker, Sl. out of one's tree, Sl. off one's trolley, Brit. Sl. off one's chump; All Sl. have bats in one's belfry, have a few buttons missing, have a few loose screws.

3. maniacal, hysterical, madding, Archaic. wood, delirious; frantic, frenzied, frenetic; ranting, raving, storming, foaming at the mouth, convulsing; overwrought, distraught, upset, worked-up, wrought-up, stirred-up; exasperated, provoked; beside oneself, at one's wit's end; out of control, uncontrollable, unre-strainable, corybantic, Inf. haywire, berserk, rabid, wild; violent, stormy, fierce, tempestuous, tumultuous, turbulent.

4. absurd, silly, inane, fatuous, crackbrained, foolish; irrational, wild-eyed, illogical, unreasonable; senseless, nonsensical, pointless; ridiculous, laughable, risible, derisible, ludicrous, Sl. for the birds; asinine, anserine, idiotic, Inf. moronic, imbecilic; childish, puerile, immature.

5. stupid, simple-minded, bird-brained, feeble-minded, dull-witted; harebrained, light-minded, light-headed, giddy, rambling, driveling, wandering, incoherent; scatterbrained, absent-minded, confused; muddled, muddlepated, bemused.

6. impractical, injudicious, unsensible; unfounded, groundless, unsound; preposterous, extravagant, excessive; inappropriate, inept, improper, incongruous, inconsistent; imprudent, indiscreet; unwise, ill-considered, ill-suited, ill-advised; short-sighted, careless, unwary, irresponsible; reckless, rash, harum-scarum; unsafe, dangerous, perilous.