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1.
A total douche who shows off his muscles like the guy in the Iron Gym commercial.
Person A: "Man, I just lifted like a thousand pounds."
Person B: "You're a total muscle man."
by Mrbiginpants January 18, 2009
 
2.
A coolidiculous term for a person who is neither an athlete nor a body builder but still physically strong
I need muscle-man tonhelp me cross the street with my grocery bags.
by Sexydimma October 14, 2014