"hammerheads" in the noun sense
1. dunce, dunderhead, numskull, blockhead, bonehead, lunkhead, hammerhead, knucklehead, loggerhead, muttonhead, shithead, dumbass, fuckhead
a stupid person these words are used to express a low opinion of someone's intelligence
the striking part of a hammer
3. hammerhead, hammerhead shark
medium-sized live-bearing shark with eyes at either end of a flattened hammer-shaped head worldwide in warm waters can be dangerous
Source: WordNet® (An amazing lexical database of English)
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