Green’s Dictionary of Slang

(UK Und.) a sword.

1688		T. Shadwell Squire of Alsatia I i: The prigster lugged out in defence of his natural, the captain whipped his porker out, and away rubbed prigster and called the watch.
c.1698		B.E. Dict. Canting Crew n.p.: Porker c. a Sword.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
c.1750–1855		B.M. Carew Life and Adventures.