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4.
noun - clothing worn when not being a pussy about something.
Marc put on his man-pants when he took another shot.
by Trashy Stachy July 20, 2010
 
1.
The hair that goes from a man’s ankles to his waist, thus creating pants made out of hair. Only the men with big schlong’s have the best man pants. Not to be confused with a Man Onesie; which is hair that goes from a man’s ankles to his shoulders aka Chewbacca.
E.g.1

Girl 1: My boyfriend has the best pants!
Girl 2: OMG i know look at those Man Pants

E.g.2
Boy 1: Marc has the best Man Pants
Girl 1: I know, I'm gonna root him tonight!
by MROS May 29, 2013
 
2.
to have courage, guts, bravery, horse sense, gumption
"Just grow some balls and put on your man-pants". 
by Dan Schrack August 19, 2010
 
3.
A man with a bulge in all the right places.
For instance, when a man wears good quality pants that fit snug in his butt, as well as frontal area, making every girl wonder what's under those man pants.
by Fizabeth February 13, 2011
 
5.
1. A pair of pants that are exceptionally manly. Usually made of good firm material that is as rugged and tough as the man who wears them.
Matt is wearing those man pants again, how dreamy.
by Napalm December 10, 2003