Best Answer - Chosen by Voting
To "take it on the chin" is an idiom meaning to accept defeat, insult, or penalty. "Cop" can be slang for "take" or "receive" in certain situations. So this looks like an idiom that's been altered with slang. Of course it could also have the literal meaning, to receive a punch or hit on the chin. Hard to tell without the context.
Submit your answer
Please enter between 2 and 2000 characters.
If you copy this answer from another italki answer page, please state the URL of where you got your answer from.