Green’s Dictionary of Slang

Abergavenny n.

[rhy. sl.; ult. Welsh town]

a penny.

1971		J. Jones Rhy. Cockney Sl.
1984		Partridge DSUE (8th edn) 2/1: later C.19–early 20.
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.