To bitch and moan constantly to the point where it feels there is a river of menstrol blood flowing through the room you are standing in.
Both Male and Female can and do bleed rivers.
"Ah man I got home late last night and my mother was bleeding RIVERS on me"
- dude spills drink on another dude
person 1 "WHAT THE FUCK MAN"
person 2"Stop bleeding rivers man it was an accident"
person 1"Your right brotha, its cahz"