Green’s Dictionary of Slang

cop for v.

[cop v. (2a)]

1. (also cop to) to confess, to own up to, to admit.

[US]Current Sl. III–IV (Cumulation Issue) 30: Cop, v. To admit something.
[UK]G.F. Newman You Flash Bastard 157: Those Paks copped for the lot, must’ve cleared up every reported case of dipping we’ve had.
[US]J. Ellroy ‘Hot-Prowl Rape-O’ in Destination: Morgue! (2004) 314: ‘What’s with the confessing? Tell us about that.’ [...] ‘I copped to all the big snuffs. You name it, I copped to it [...] It was my thing back in the old days.’.

2. to obtain.

[UK]N. Smith Gumshoe (1998) 163: ‘My time in America wasn’t entirely wasted,’ she said. ‘That where you copped for the phoney accent?’.
[UK]K. Sampson Outlaws (ms.) 58: When they copped for a bundle they always boxed JPB off, too.

3. to have a relationship with.

[UK]K. Sampson Powder 23: Simon Le Bon for God’s sake, a provincial tubby if ever there was one, managed to cop for Yasmin Pervanneh off the hair adverts.

4. to make a successful seduction.

[UK]Guardian Sport Apr. 16: I’ll be right there as soon as I’ve told me mates I’ve copped for it.

5. to claim.

[UK]J.J. Connolly Layer Cake 251: I bet he had double-bubble sometimes, copped for the reward-money as well.

In phrases