an aggressive term for shooting someone, normally used by those of a darker skin tone or just straight up people from Da Hood.
"drop the money or i'ma pop a cap in yo ass"
"get back here before I pop a cap in yo ass"
"bro, did you hear about the incident that happened the block around the corner? shit was crazy, one dude popped a cap in everybody's ass."
To kill someone and get away with it .Guicci yo Ass
Try to take my chain I'm go Guicci yo ass.