Green’s Dictionary of Slang

kipe v.

(US) to steal; the shoplift.

1934		T. Minehan Boy and Girl Tramps of America (1976) 199: Three long butts I kipped right in front of the entrance.
1938		W. Smitter F.O.B. Detroit 86: ‘We could put it in there.’ ‘Too risky,’ he said ‘Some kid would kipe it.’.
1970		E. Thompson Garden of Sand (1981) 364: They were out to cheat you blind before you kypped half their store.
1975		G. Underwood ‘Razorback Sl.’ in AS L:1/2 62: They kiped that car last night.
1984		J. Ellroy Because the Night 232: Johnny imagines all manner of chrome gadgetry that he could kipe.
1985		‘Jennifer Blowdryer’ Modern English 25: kipe (v): A Brit word for shoplift, five finger discount.
1997–2001		Online Sl. Dict. 🌐 kipe v 1. to steal. (‘Don’t kipe my sandwich!’).

In phrases

kyper cove (n.)

(UK Und.) a safebreaker.

1846

Swell’s Night Guide 124/1: Kyper cove, a cracksman.