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A condition developed by males after repeted pummeling of their testicles (either from fighting, or from smacking violently against a partner during sex)
Ex 1. Did you watch the game last night? Tom Brady was sacked so many times by Saints defenders, I think he might have tankballs this morning.

Ex 2. I bent that chick over my desk and fucked her so hard, I have a mean case of tankballs.
by Murphdawggie December 03, 2009
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