hairbrained, nonsensical, moronic, preposterous, idiotic, ludicrous, misguided, dunderheaded, laughable, absurd, wacky, imbecilic, cynical, cockeyed, asinine, dopey, fatuous, doltish, outlandish, silly, daft, wrongheaded, simpleminded, lamebrained, foolish, stupid, crackpot, whacky, fanciful, nutty, kooky, zany, foolhardy, knuckleheaded, implausible, ridiculous, clueless, misbegotten, quixotic, feckless, boneheaded, crass, illogical, brainless, devious, shameless, gimcrack, ingenious, tawdriest, obtuse, wishful, daffy, screwy, loony, gullible, diabolical, risible, dubious, bizarre, audacious, barmy, loopy, farcical, dimwitted, substanceless, hubristic, witless, bumbling, slapdash, hackneyed, dumb, puerile, unserious, vainglorious, dastardly, chimerical, non sequitur, vacuous, thoughtless, comical, childish, cloddish, goofy, pathetic, specious, lunkheaded, inept, commonsensical, swiftian, reductio ad absurdum, cretinous, foolishness, otiose, maladroit, overambitious, credulous, clever, outrageous, lame, infantile, farfetched, meanspirited, brained, daring, conceived, advised, impracticable, impractical, ambitious, venturesome, craziest, mad, abortive, adventurous

insane