knuckleheaded Definition

dunderheaded, boneheaded, moronic, crass, idiotic, brainless, sophomoric, dopey, meathead, lunkheaded, asinine, milquetoasts, lamebrained, thickheaded, inane, obnoxious, harebrained, puerile, dumb, goofy, boorish, substanceless, stupid, cloddish, wussy, jackassery, goony, silly, doofus, goofball, piggish, craven, thoughtless, pinheaded, petulant, snottiness, bratty, hairbrained, numbskull, classless, stumblebum, chickenshit, callow, asshat, foolish, whiny, martinets, dumbass, horndog, hatefully, egotistical, mindless, childish, lunk, hardass, foulmouthed, corny, shameless, wimpy, unamusing, egotists, incommunicative, slacker, heedless, outlandish, misguided, comical, fatuous, pathetic, immature, snarky, flapdoodle, malcontented, captious, sarcastic, reductio ad absurdum, pompous, truculent, egocentric, cretinous, laughable, blither, infantile, egregious, nonsensical, loathsome, ballsy, hyperbolize, numskull, hambone, uncouth, meanspirited, arrogant, nutty, imbecilic, duplicitous, shithead, vulgarian, caviling, tactless,