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The condition in which a man has three testicles. One could be considered tri-packing if he has two and a half testicles, as well. The half testicle is usually about half the size of a normal testicle, but still a third testicle. It's often connected to the normal testicle and looks like a multiplying cell just before it divides.

Sometimes this is known as a tri-blossom.
She assumed he had a huge package, but then his girlfriend revealed that it just appeared that way because he was tri-packing.
by skanklover98 June 24, 2010
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