Green’s Dictionary of Slang

apple and pip v.

[rhy. sl.]

1. to sip.

[UK]Daily Tel. mag. 17 Dec. in DSUE (1984).
[UK]Partridge DSUE (8th edn) 23/2: late C.19–20.
[UK]R. Puxley Cockney Rabbit.

2. to urinate [= sip v.1 ].

[UK]J. Franklyn Dict. of Rhy. Sl. (1981).
[UK]R. Puxley Cockney Rabbit.