Bitch Nigga Shit or BNS, is the act of doing something retarded/cowardly. Canbe used to describe snitch behaviour
Kid 1: Hey let me type that email for you
Kid 2: No ur gonna type some bitch nigga shit
Kid 1: Dude didn't she get shot because she wanted girls to go to school?
Kid 2: She got shot because she was black bro. She was on some bitch nigga shit
Kid 1: Bro have you heard about that guy that got snitched on for having photos of the test?
Kid 2: Yeah fuck whoever sniched on him. That some bitch nigga shit right there.
Shit that real niggaz do, such as sellin' drugs, killin' other niggaz, fuckin' bitches and then neglectin' his kids, goin' to buy milk and never comin' back, smokin' weed, or eatin' a lot of chicken.
Alternative meaning: shit that comes out of a real nigga's intestine.