Numskull
a person of subnormal intelligence
Synonyms
Ass, blockhead, bonehead, changeling, chump, clot, dimwit, dolt, donkey, dope, dumbass, dumbo, dummy, dunce, dunderhead, fathead, fat-head, Fool, fuckhead, half-wit, Idiot, imbecile, knucklehead, lunkhead, muttonhead, nincompoop, nitwit, nut, oaf, retard, shithead, wanker, berk, booby, bu