Green’s Dictionary of Slang

1. a tram.

a.1945		L. Payne private coll. n.p.: Tram Beef & Ham.
1969		S.T. Kendall Up the Frog 38: Plate o’ ham – Tram.

2. a pram.

1972

Dodson & Saczek Dict. of Cockney Rhy. Sl.