What is Man Cleavage?
1.
1. When a guy's pants are too low, and show a triangle of muscles before getting to the nether regions.
2. Same as girl cleavage, only on a guy.
His pants were so low, he was showing off some man cleavage!
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2.
Showing your testicles, much like a woman shows her cleavage.
The testicles and penis are equivalent to the breasts and nipples on a woman. It is proper to fully show the testicles in public, but the penis cannot be show.
That guys man cleavage is totally showing in those running shorts.
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