hardhead

noun

1. a shrewd, practical person.
2. a blockhead.
3. a freshwater fish, Mylopharodon conocephalus, of California.
4. the Atlantic croaker.See under croaker(def 2).
5. hardhead sponge.
6. hardheads. a common knapweed, Centaurea nigra.
7. hard head.

noun

1. an alloyed silver coin of Scotland, issued in the 16th and 17th centuries, equal to one and one-half pence and later to twopence.