Green’s Dictionary of Slang

cop-out adj.

[cop out v.2 ]

1. (also copped-out) compromised, defeated.

[US]S. King Christine 66: But that was a copout job.
[UK]J. Hawes Dead Long Enough 21: You think that all these tossers over twenty-five have somehow chosen their copped-out lives.

2. evasive.

[UK]A. Salkey Come Home, Malcolm Heartland 146: What sort of cop-out response is that, man!
[UK]N. Barlay Crumple Zone 200: Wha’ever don’t answer nuffink. Wha’ever is a noncey cop-out word.