When one inserts their finger into their ass then aims the finger and blows on it towards an unsuspecting victim. This can also be done with a very filthy belly button.
Shaun just got back from the gym and gave nancy an vicious ass gun.
by Figueiredo August 23, 2007
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The gun "allegedly" used by rapper Gun Rack in the show Key & Peele to kill Darnell Simmons.
"Shot up Darnell with a long ass gun and tossed it into the aquarium."
by MrBro-iden September 6, 2015
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A bombardment of explosive farts and shit-projectiles that shoot out of the anus at rapid speeds so fast that if you try to use toilet paper, it will shoot right through it leaving holes with brown rings around it.

-usualy sounds like: "KAck Kack Kack Kack kersplash Kack Kack kack Kack kack"
I was sitting on the toilet and started to freak out as my Ass Machine Gun started annihilating my toilet bowl with the most potent Highpowered shit ive ever smelt in my life.
by JoeyToesy April 13, 2006
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