Top Definition
Where one bro slaps his ballbag onto another bro's ballbag. This defiant act is usually performed with some momentum. The game will then continue till one bro pulls out, if this does not happen then they shall tie their ballbags together.
Hey look man, Those two bro's are Slappin' their ballbags together.

I think it's just Luke and Andy Ballbag Wrestling again!
by Neil "Paddington" Wilding April 13, 2010

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