Green’s Dictionary of Slang

1. a bed, a sleep [kip n.¹ ].

1960

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.

1969		W. Mitford Lovely She Goes in DSUE (1984).
1981		P. Wright Cockney Dialect and Sl. 103: jockeys’ whips ‘chips’.
1998		R. Puxley Fresh Rabbit.
2003		N. Griffiths Stump 75: Last thing I ate was that bag of jockeys.