What is Fiddler On The Roof?
1.
When you sit naked on your sexual partner's head, placing your testicles on their forehead and have your partner jerk you off.
Last night, I made my girlfriend play fiddler on the roof, she was not pleased, and now we aren't talking.
See
2.
The sexual act of jumping ontop of someone named Bobby while playing the semen game. See SEMEN GAME.
We were so playing Prince of Persia when that bastard Joe yelled SEMEN and i was off on Bobby like nobody's business.