it's/that's a fair cop

it's/that's a fair cop

An admission of wrongdoing upon being caught. Primarily heard in UK, Australia. What can I say? It was a fair cop. They saw me dumping my rubbish right there in the alleyway.
See also: cop, fair
Farlex Dictionary of Idioms.

it's a fair cop

an admission that the speaker has been caught doing wrong and deserves punishment.
See also: cop, fair
Farlex Partner Idioms Dictionary

it’s a fair ˈcop

(British English, spoken, humorous) used by somebody who is caught doing something wrong, to say that they admit that they are wrong: He just said, ‘it’s a fair cop’ and handed the bag to one of the policemen.
See also: cop, fair
Farlex Partner Idioms Dictionary
See also:
  • it's a fair cop
  • cop it
  • cop hold of
  • cop hold of (someone or something)
  • chance (one's) arm
  • chance your arm
  • let the side down
  • cop on
  • blow the whistle (on) (someone), to
  • be not much cop