or bully-rock, subs. phr. (old).Originally a boon-companion; later, however = a swaggerer, a bully, a bravo.
1596. SHAKESPEARE, Merry Wives of Windsor, i. 3. Why says my BULLY-ROOK?
1633. SHIRLEY, The Witty Fair One, iii., 4. Suck in the spirit of sack, till we be delphic, and prophesy, my BULLY-ROOK.
c. 1696. B. E., A New Dictionary of the Canting Crew, s.v. BULLY-ROCK, c. a Hector, or Bravo.
1697. The Praise of Yorkshire Ale.
| My BULLY-ROCKS, Ive been experienced long | |
| In most of liquors. | 
1754. B. MARTIN, English Dictionary (2 ed.). Bully, or BULLY-ROCK, 1. a boisterous, hectoring fellow.