When you first have sex with your girlfriend and discover she has a penis

(aka a trap)
so I got her in my room and she wipped out a cock!
she was a girlfriend man!
by johnathanpenisman February 25, 2010
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A male friend who is a surrogate replacement of a girlfriend or spouse in a heterosexual way. MGs are in near constant communication and may talk more than an actual girlfriend or spouse. Similar to a wingman but with more responsibility, a man-girlfriend will do anything that is typically done by a girlfriend (other than sex). Seth and Evan, in the cult classic Superbad, were man-girlfriends.
“My man-girlfriend hasn’t called me today and I’m starting to get a little worried.”

“Dude, have you talked to Brady lately? What the hell is his problem? His man-girlfriend is out of town and he’s going into withdrawal.”
by the_kaiser January 9, 2008
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a guy who always has a girlfriend; relies on women for happiness, usually because of mommy issues.
my ex got a girl right after we broke up.”
“girl- he’s a girlfriends man”

“you always have a girlfriend. You’re a girlfriends man”
by bonnie_yan December 27, 2022
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