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The male scrotum. The nut sack. The ball sack.
Rachel was sucking my prune bag last night.

I really get off wanking when I pull my prune bag.

Your mom fondled my prune bag last night braaaaahhhh.
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by Tugg N. Harder April 24, 2017
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Anyone or any type of animal that has it testicles cut out or has been castrated. It causes the nut sack to shrivel up like a prune
I took my dog to get neutered, & now his name is "prunebag."
by Awebb206 March 11, 2017
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