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1.
Another comical and witty name for testicles. Referring to testicles as testaballs usually guarantees a laugh or two from everyone around you.
Person 1: Oh dear, you seem to have struck my testaballs.
Person 2: Haha excuse me, I slipped on this slick floor, i'm sorry that I kicked your testaballs.
Person 1: Haha, it's alright.
Person 2: Goodbye.
Person 1: Goodbye.
by G4 sect March 17, 2013