Activities of particular manliness that are usually unacceptable for a woman to be doing. Usually referred to when one is asked what he is doing.
man 1: Hey, where are you going?
man 2: I've got man shit to do.
man 1: What's man shit?
man 2: Punching people, running the country... y'know, man shit.
man, shit is a phrase said when somebody is distressed or depressed about something. it can also be said to agree with somebody is depressed or distressed.
Freddy- "man, shit. i have not been laid in 4 years."