What is Ass Cannon?
1.
1. place your partner on their shoulders, preferably with some sort of back support. your partner's ass should be in the air.
2. straddle your partner's ass and shove your balls - ONLY your balls - into your parnter's asshole. (this may be painful on the balls, depending on the elasticity of the currently penetrated asshole)
3. with an erection, and while your balls remain in your parnter's asshole, slowly rotate around your partner making cannon noises, much like a the turret of a tank. Onomatopoetic words, such as "boom" and "chk-burrgh* are appropriate.
"Holy Christ, this ass cannon is doing some serious damage!"
See
2.
insult directed towards a person/friend who is constantly releasing methane gas
Damnit Ken! Plug your fucking ass cannon, I'm tired of the room smelling like shit all the time!
