ball clapping is when your nuts hit right between your dick and your ass. usually makes a loud noise when hitting, especially when sweaty! Tends to happen during sexual intrercorse, and when jacking off.
by nirvana4lf January 22, 2005
I meant to kick Dillon in the ass, but I went to far and kicked him in the balls, I heard the ball clap and I knew he was down for the count.
by jakinator812 August 16, 2009