Green’s Dictionary of Slang

1. a talk; also as v.

1960		J. Franklyn Dict. Rhy. Sl.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl. 36: roast pork. Talk; usually reduced to roast, also roasting, often with ref. to making a complaint as in: Now, what are you roasting about? (early 20th c.).
1984		Partridge DSUE (8th edn) 981/1: roast pork. To, a, talk [...] since ca. 1910.
1992		R. Puxley Cockney Rabbit.
2002		Pete’s Aussie Sl. Home Page 🌐 roast pork: a talk.

2. a table fork.

1960		J. Franklyn Dict. of Rhy. Sl. 114/2: roast pork [...] (2) fork, was current in the army during the second war.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.
1984		Partridge DSUE (8th edn).
1992		R. Puxley Cockney Rabbit.
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.