bust a cap

Attested in "True Grit" by Charles Portis, 1968, but most likely much older.

The derivation is probably from the percussion "cap," a small metal cylinder open at one end with an amount of shock-sensitive explosive, usually fulminate of mercury, used to set off the powder charge in a muzzle-loading firearm.

The modern derivation, however, is probably from the "cap gun," a toy firearm using paper "caps" containing Armstrong's mixture or a similar substance to provide the small explosions.

"I have never busted a cap (bust a cap) on a woman or anybody much under sixteen years but I will do what I have to do." -- "Lucky" Ned Pepper

by ET Molligee September 20, 2014

Bust a cap

A slang phrase referring to the posession and use to a certain individial of a firearm or any other object resembling a firearm that emits any sort of a projectile.

"Imma bust a cap in yo mothafuckin ass bitch!"

by www.blingblingx.da.ru November 30, 2004

bust a cap

To discharge a handgun, usually a 9mm, in the direction of an enemy or a rival gang.

Im gonna bust a cap in his punk ass

by HeavenlyHost July 4, 2003

busted a cap

To Shoot someone. Or to get shot

1.Man that "fiddy sent" busted a cap in his ass.
2.I busted a cap in "Fiddy sents" asss

by ub3r n00b3r September 23, 2004

Bust a cap

To discharge a round of ammunition from a firearm, usually a handgun.

Fuck wit me, and I'll bust a cap in yo ass biatch!!!!
That fool was disrespectin' a brutha so I had to straight bust a cap in his ass!

by Streetsouljah September 16, 2008

Bust a cap

To unload your gun on someone and ultimatley, kill them. A very popular activity in the ghetto.

Nigga 1: Hey you want some of dis sheeit?
Nigga 2: Ah, I don wan dat shit.
Nigga 1: I don give a fuck, I don't play that shit, and I'm about to bust a cap motha nigga.

by jakrel September 6, 2005

Busting a Cap

Peeing after you cum pushing the left over cum out of your penis.

I just jerked off then I was busting a cap in the toliet.

by Cellucci November 30, 2018