Green’s Dictionary of Slang

(US black teen) a general term of black-on-black abuse, lit. a black person who complains.

1995		L. Stavsky et al. A2Z 7/2: bitch-ass nigga – a weak, effeminate or soft guy who can be easily victimized: That bitch-ass nigga is gonna get herbed.
1996		P. Beatty White Boy Shuffle 48: Say, bitch-ass, c’mere.
1999		Dr Dre ‘Bitch Ass Niggaz’ 🎵 Bitch niggaz (bitch niggaz) / Bitch-ass niggaz (bee-atch).
2000		Hip-Hop Connection Jan./Feb. 26: ’Bout three years ago I beat that bitch ass. She stopped stalking me too.
2011		G. Hayward Corruption Officer [ebk] cap. 11: Rufis [...] he’s what you call a B.A.N. [...] A Bitchassnigga [who] never was nobody before this job, got buillied in high school, and never got no chicks.