Top Definition
The hairy sack between the male's legs. Manipulating, adjusting or "jostling" this sack is apparently a male ritual.
1. It was really hot out, so I had to shake my jostlebag loose a couple of times.

2. That chick is a freak. She tried to make tea with my jostlebag.
by Hank Spatter July 06, 2004

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