Origin of hard head
Examples from the Web for hard head
The name given by American fishermen to the hard-head (which see).
"Blind-eye, hard-head" was ever his sort, but I love to take my danger open-eyed and standing up—and as little of it as possible.The Men of the Moss-Hags|S. R. Crockett
A fish of the herring kind, called also hard-head (which see).
A fish of the salmon family, found in the lakes of North America; also a name of the hard-head (which see).