pop a cap 

to blow a naked donkey

to perform a prosegure called milking the prostate

pop a cap by In the ass October 10, 2003

pop a cap 

to shove a cap off something

"I'll pop a cap in yo ass!" -Mike Zablotny

pop a cap by Anonymous February 3, 2003

Pop A Cap  

To shoot someone, most likely a hater of some sort. Usually a gansta, will make this threat. But on occasion a wanksta, will make this threat you can usually tell the two, for example a gansta will be an angry black man screaming and making a big deal about something very small, and a wanksta will be the white guy in baggy pants of some sort and wearing a 5XL shirt trying to look hard but making a fool of himself.

"Fool you best back up befo' I pop a cap all up in yo' head."

Pop A Cap by Kyle Cortese January 6, 2008

pop a cap in your ass 

to shoot someone

Yo dawg imma go pop a cap in his ass

pop a cap in your ass by Justin Russikoff April 16, 2003

pop a cap in yo ass 

Ebonics for: "discharging a firearm into your body with the intent to cause grievous bodily harm"

nigga: yo son, you scuffed ma tims, imma pop a cap in yo ass

white man: ????

translator: he says because you have accidentally stepped on his costly Timberland footwear and caused small particles of debris to reside on said footwear, he will discharge a firearm into your body with the intent to cause grievous bodily harm

white man: :(

pop a cap in yo ass by Young Reezie December 13, 2009

pop a cap in yo ass 

a sentance a black person would use to warn someone that they are going to shoot someone

yo motha fucka back yo ass up 'fore i pop a cap in yo ass!

pop a cap in yo ass by sara gibson May 22, 2004

pop a cap in yo ass 

(verb)1. To put a bullet in one, or shoot one.

"Quit frontin', bitch, or I'll pop a cap in yo ass."

pop a cap in yo ass by Timothy McVay May 30, 2006