a stupid person; these words are used to express a low opinion of someone's intelligence
the striking part of a hammer
medium-sized live-bearing shark with eyes at either end of a flattened hammer-shaped head; worldwide in warm waters; can be dangerous
- His words stunned Deborah -- a hook like that was the size of a hammerhead!
- This maneuver looks like the hammerhead performed by the small aerobatic planes.
- Now I see just one hammerhead nearby.
- It's a heaven for hammerhead and white tip sharks, as well as manta rays.