look up any word, like blumpkin:
 
1.
When engaging in Missionary style sex, the male forces his testicles into the female partner's anus. (Pool ball into a hole.)
Damn, girl your ass is so loose I could give you the billiard.
by Duthu August 13, 2006
 
2.
When a man with his erect penis swiftly jabs another man's testicles.
We didn't have a condom, so I gave the guy The Billiard.
by Uber Adorkable October 24, 2009