Bitch niggas got rampant. Out of control. Real men didn't control them and run them off so the bitch niggas multiplied. and they were like oh...i see this guy can be a bitch nigga
Well i'm a bitch nigga...i can be one too!!
That's what happened.
Edit....
**not only did more people join the bitch nigga movement, but then there was/is also a competition to see who can be the King, or is it QUEEN of the bitch niggas.**