nincompoop Definition

ninny, poop, oaf, ass, boob, dodo, dope, dolt, moron, buffoon, dimwit, nitwit, cretin, imbecile, ignoramus, idiot, doofus, dunderhead, dullard, simpleton, halfwit, dufus, dunce, bozo, windbag, dumbass, twerp, numbskull, jackass, pillock, douche bag, twit, dickhead, shithead, blowhard, asshat, nutcase, schmuck, dweeb, lunatic, bastard, gormless, prevaricator, ninnyhammer, rube, jackanapes, wackjob, bungler, poltroon, panderer, boor, twat, lout, slimeball, berk, lecher, lamebrain, flunky, prig, rascal, knave, shmuck, asshole, wimp, popinjay, bootlicker, blockhead, vulgarian, meany, flatterer, poseur, sycophant, scumbag, mountebank, rotter, braggart, bloviator, blackguard, scoundrel, lummox, yokel, nonentity, reprobate, prat, cretinoid, weirdo, nutter, tosspot, schnook, philistine, sluggard, nidget, plagiarist, simp, stoolie, peckerwood, slob, bumpkin, ditherer, ingrate,