Hypertext Webster Gateway: "knucklehead"
From WordNet (r) 1.7 (wn)
knucklehead
n : these words are used to express a low opinion of someone's
intelligence [syn: {dunce}, {dunderhead}, {numskull}, {blockhead},
{bonehead}, {lunkhead}, {hammerhead}, {loggerhead}, {muttonhead},
{shithead}, {fuckhead}]
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