Hardhead n. : Clash or collision of heads in contest.

Hardhead n. : The menhaden. See Menhaden.

Hardhead n. : Block's gurnard (Trigla gurnardus) of Europe.

Hardhead n. : A California salmon; the steelhead.

Hardhead n. : The gray whale.

Hardhead n. : A coarse American commercial sponge (Spongia dura).

Example:
How do you pottytrain Hardhead ferrets?!?

Taxonomy
Hard Head Management, Village Station.

Defination from the web:
Hard Head Management. PO Box 651 - Village Station. New York, NY, 10014. info@hardhead.com ...