two guys take a girl each, then all four of them enter a room, each guy takes a girl from behind on opposite sides of the room (like a tennis court), they proceed to ram the girl hard enough for them to moan, they ram their girls back and forth in an opposite fashion, this simulates two females playing tennis (in tennis, when a female hits the ball, she lets out a distinguishable moan)
"Tommy, me and you were totally playing tennis with those two girls last night. We blew them out of the water."
The act of passing a software issue back and forth between two developers, each claiming it's the other's responsibility. Usually in Bugzilla, though other issue-tracking software applications are acceptable.
Manager: Why hasn't that issue been fixed yet??
Employee: Ron and Jon have been playing bug tennis with it for weeks now...
A game one engages in whilst intoxicated. The 'game' revolves around 2 players (equipped with a tennis racquet and ball) challenging eachother by projecting a tennis ball at the opposite player in an attempt to strike them. If the ball does strike the other player, the striker gets another shot. If the striker misses, the opposite player gets the ball to hit. The player that gets hit to the point of withdrawing from the game loses. This may sound easy, but this game is meant to be played whilst intoxicated thus ramping the difficulty.
I played Death Tennis with my brother and killed him in the process. Or: Death Tennis is the leading cause of death.