Slap Cannon 

Incredible powerful speaker system that can blow out ear drums and car windows. Capable of shaking the very ground you stand on.

WTF was that?

That man got some slap cannons blowing out everyones windows.

Slap Cannon by cabdragon333 August 30, 2009

The Cannonball Slap 

The act of hanging on your ceiling fan and dropping a large log into your partner's rectum, thus slapping her innards. The vagina can work too, but she may not like it.

Dude, I totally wanted to The Cannonball Slap to your sister last night.

The Cannonball Slap by Eric DontTryThisAtHome BigDick December 7, 2010