One of the funniest way to pee ever invented. It's the act of holding your prepuce together over your penis while peeing so that no liquiq comes out. The accumulation then forms a kind of bubble of pee that you can release like a bomb.
Jimi - Carl can hold his pee bubble bomb up to ten seconds!!!
Jamal - Whoo! He's a real trooper! How big does it get ?
Jimi - Almost as big as a tennis ball. He has years of training.