Green’s Dictionary of Slang

apple-pips n.

[rhy. sl.]

the lips.

[UK]J. Franklyn Dict. Rhy. Sl.
[UK]Dodson & Saczek Dict. of Cockney Rhy. Sl.
[UK]Partridge DSUE (8th edn) 23/2: C.20.
[UK]R. Puxley Cockney Rabbit.