The senseless shit talking that occurs after you put someone in handcuffs. It usually involves phrases pertaining to hating the police and cops as well as threats about what the individual would do if they were not restrained by handcuffs. the general theme of perp talk is anger or aggression towards law enforcement officers.
One cop to another: You should have heard the perp talk from the one i locked up the other night for assualt. She talked mad shit while in the back seat of the cruiser and even tried to spit at me.