Grab Collar Punch Face, a phrase that can get you out of any situation. Or make the one you're in worse.
Simply , you grab the person who's giving you trouble by the collar, punch that sunbitch in the face, and run.
If people are chasing you, Start running, while your running grab someone by the collar and punch them in the face, thus plopping them senselessly on the ground making an obstacle for the people chasing you.
to be used when someone is talking shit and they need to be silenced. Or when you're fleeing for your life.
"This guy owed Jim money and wouldn't pay up, so Jim went to that motherfuckers house and GCPF'd him right in front of all his kids and his wife, took the money and dipped".