when a man is fickle, has anger issues and can't treat anyone with respect. usually likes the chase and stops trying when they bag the girl. (they belong in the trash, beware ladies)
"he stopped paying attention to me after we finally got together"
"oh sweetie that man must be a pices "
Not to be confused with man-musk, the sent of sexy ballers in a forest, no no no. Man-must is the deformed doppelganger of man-musk, think a room of teenage boys unwashed and sweatn' up something offensive.
The gimp storage unit in the Pleasure Dome reeks of man-must. Go clean it you BANANA HAMMOCK!