Billycock \Bil"ly*cock\, n., or Billycock hat \Bil"ly*cock hat`\ [Perh. from bully + cock; that is, cocked like the hats of the bullies.]

A round, low-crowned felt hat; a wideawake. ``The undignified billycocks and pantaloons of the West.'' --B. H. Chamberlain.

Little acquiesced, and Ransome disguised him in a beard, and a loose set of clothes, and a billicock hat. --Charles Reade.

Source: Webster's Revised Unabridged Dictionary (1913)