Hammerhead

n.	1.	(Zool.) A shark of the genus Sphyrna or Zygæna, having the eyes set on projections from the sides of the head, which gives it a hammer shape. The Sphyrna zygæna is found in the North Atlantic. Called also hammer fish, and balance fish.
	2.	(Zool.) A fresh-water fish; the stone-roller.
	3.	(Zool.) An African fruit bat (Hypsignathus monstrosus); - so called from its large blunt nozzle.

Noun	1.	hammerhead - these words are used to express a low opinion of someone's intelligence Synonyms: blockhead, bonehead, dunce, dunderhead, fuckhead, knucklehead, loggerhead, lunkhead, muttonhead, numskull, shithead
	2.	hammerhead - the striking part of a hammer
	3.	hammerhead - medium-sized live-bearing shark with eyes at either end of a flattened hammer-shaped head; worldwide in warm waters; can be dangerous Synonyms: hammerhead shark

blockhead, bonehead, dunce, dunderhead, fuckhead, knucklehead, loggerhead, lunkhead, muttonhead, numskull, shithead, simple, simpleton