Green’s Dictionary of Slang

(UK Und.) bacon.

c.1566		Harman Caveat for Common Cursetours in Viles & Furnivall (1907) 86: Shee hath a Cacling chete, a grunting chete ruff pecke, cassan, and poppelars of yarum She hath a hen, a pygge, baken, cheese, and mylke porrage.
1592		Groundworke of Conny-catching [as cit. c.1566].
1608		Dekker Lanthorne and Candle-Light Ch. 1: If we mawnd Pannam, lap, or Ruff-peck.
1612		Dekker ‘Canting Song’ O per se O O1: Duds and Ruffe-pecke, rombol’d by Harman-becke and won by Mawnders feates.
1641		R. Brome Jovial Crew II i: Here’s Ruffpeck and Casson, and all of the best, / And Scraps of the Dainties of Gentry Cofe’s Feast.
1665		Head Eng. Rogue I 45: [as cit. 1612].
1674		‘The Beggars Curse’ Head Canting Academy (1674) 14: If we maund Pannam, lap, or ruff peck.
1688		R. Holme Academy of Armory Ch. iii item 68c: Canting Terms used by Beggars, Vagabonds, Cheaters, Cripples and Bedlams. [...] Ruff-peck, Bacon.
c.1698		B.E. Dict. Canting Crew n.p.: Ruff-peck c. Bacon.
1707		Rum-Mort’s Praise of Her Faithless Maunder in Dodsley (1826) 36: Redshanks then I could not lack, / Ruff peck still hung on my Back.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1754		Scoundrel’s Dict. 15: Bacon – Ruff peck.