\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.