when a man sits and farts and the gas goes up between his balls and up his back at the same time.
i was watching a movie the other day and started laughing. not at the movie, but at the ballbacker.
by hubdub July 11, 2010
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When you have balls behind your first set of balls
Bro I saw this dude in the change room, he had four balls! He’s a ballback!!!
by Ballback November 06, 2017
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