bullhead Meaning, Definition & Usage

  1. noun freshwater sculpin with a large flattened bony-plated head with hornlike spines
  2. noun any of several common freshwater catfishes of the United States
    bullhead catfish.

WordNet

Bull"head` noun
Definitions
  1. (Zoöl.) (a) A fresh-water fish of many species, of the genus Uranidea, esp. U. gobio of Europe, and U. Richardsoni of the United States; -- called also miller's thumb. (b) In America, several species of Amiurus; -- called also catfish, horned pout, and bullpout. (c) A marine fish of the genus Cottus; the sculpin.
  2. (Zoöl.) (a) The black-bellied plover (Squatarola helvetica); -- called also beetlehead. (b) The golden plover.
  3. A stupid fellow; a lubber. Colloq. Jonson.
  4. (Zoöl.) A small black water insect. E. Phillips.

Webster 1913