Green’s Dictionary of Slang

jockey’s (whip) n.

[rhy. sl. ]

1. a bed, a sleep [kip n.1 ].

[UK]J. Franklyn Dict. of Rhy. Sl. 85/1: Jockey’s whip kip (bed or sleep) [...] during the second war and now obsolescent.

2. in pl. potato chips.

[UK]W. Mitford Lovely She Goes in DSUE (1984).
[UK]P. Wright Cockney Dialect and Sl. 103: jockeys’ whips ‘chips’.
[UK]R. Puxley Fresh Rabbit.
[UK]N. Griffiths Stump 75: Last thing I ate was that bag of jockeys.