Green’s Dictionary of Slang

foin n.

[SE foin, a thrust with a pointed weapon]

(UK Und.) a cut-purse or pickpocket.

Show quotations
[UK]Greene Art of Conny-Catching in Grosart (1881–3) 38: In Figging law. The picke pocket, a Foin He that faceth the man, the Stale Taking the purse, Drawing Spying of him, Smoaking The purse, the Bong The monie, the Shels The Act doing, striking.