knucklehead

knucklehead
    n 1: a stupid person; these words are used to express a low
         opinion of someone's intelligence [syn: {dunce},
         {dunderhead}, {numskull}, {blockhead}, {bonehead},
         {lunkhead}, {hammerhead}, {knucklehead}, {loggerhead},
         {muttonhead}, {shithead}, {dumbass}, {fuckhead}]
    

40 Moby Thesaurus words for "knucklehead":
      addlebrain, addlehead, addlepate, beefhead, blockhead, blubberhead,
      blunderhead, bonehead, bufflehead, cabbagehead, chowderhead,
      chucklehead, clodhead, clodpate, clodpoll, dolthead, dullhead,
      dumbhead, dunderhead, dunderpate, fathead, jolterhead, jughead,
      lunkhead, meathead, muddlehead, mushhead, muttonhead, noodlehead,
      numskull, peabrain, pinbrain, pinhead, puddinghead, pumpkin head,
      puzzlehead, stupidhead, thickhead, thickskull, tottyhead