When you have committed a crime and you have a cop in your pocket, that means you have a police officer friend who will manipulate police reports to help you avoid arrest or legal accountability for crimes you have bragged about committing.
I got a Cop In Pocket and another Cop On Text, I can do whatever I want.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi