It's a fair cop

It's a fair cop.

  (British & Australian very informal)
something that you say in order to admit that someone has caught you doing something wrong It's a fair cop. I was driving way too fast.
See also: cop, fair
References in periodicals archive ?
It's a fair cop when Len catches Cain with Ollie, but he later finds out it's a fair cop that Angie Cain really wants.