Ball Dipping 

The act of inserting ones testicles into the anus of another person. This act may be consentual, but is often not. Said testicles will need to be well lubed and often the anus stretched out before ball dipping can be conducted.

Also known as bdipping, dipping and bdips.

Warning: Can lead to poopy balls

Person One: "Why are you walking like that?"
Person Two: "I got ball dipped last night"

Or:

Ball Dipper: "I caught my girl friend cheating on me. She'll regret that after I do a little ball dipping on her!"

Ball Dipping by Excitable Boy_1024 April 26, 2010