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The act of giving a guy on guy massage. Usually used as a joke between buddies.
Friend 1: Yo dude you want to give that guy a mansage, You've been eyeing him all night.

Friend 2: Hahaha, very funny, now go fuck off.
by Brosig August 11, 2005
Its a man-to-man massage
"Hey Fred want a mansage?"
by Edward Austin January 29, 2003