Snatch piece

Vagina. As is ‘snatch’ alone, but used similarly to ‘ring piece’ for anus.

Take off your panties and let me see your snatch piece.

Brown Paper

Cockney rhyming slang for ‘caper’.

As in “what’s your brown paper?” Or what’s your game? (What are you up to?). Heard as far back as 1978, possibly earlier.