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doing something totally manly.
definitely something not boyish.

like punching a girl in the face.
Susie: are you coming over to my house tomorrow?
Johnny: ah fck that im doing man stuff
by Scott spoyner March 07, 2008
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1. adv. To be manly or the act of being manly
2. adv. To hurt someone or the act of hurting someone
3. v. To have gay sex or the act of having gay sex.
1. I'm gonna go do manstuff...
2. I'm in the mood for doing some manstuff.
3. how about you and I go to my place and we do some manstuff
by Blastdoors. October 20, 2010
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