When you are at a sauna after working out and you are naked and start rocking hips side to side as to hit their balls together.
by noobslaya703 May 16, 2011
When a man's two testicle collide within the scrotum resulting in a painful feeling. Much like that desk toy with the swinging balls.
by Gordonopus September 05, 2010
by hobowdahhhh January 25, 2017