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1.
One muscleman engaging in sex with another man. The muscleman can be either the one initiating the act, the person invited to engage in the act, or both.
"I heard Steve really had a good time last night."

"Yeah. He invited a real hunk over for musclesexing."
by UD-Friendly October 19, 2009

Words related to Musclesexing

bodybuilder homosexual muscles musclesex muscular sex