Green’s Dictionary of Slang

bitch-ass (nigga) n.

also B.A.N.
[bitch-ass adj. + nigga n.]

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

[US]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.
[US]P. Beatty White Boy Shuffle 48: Say, bitch-ass, c’mere.
[US]Dr Dre ‘Bitch Ass Niggaz’ [lyrics] Bitch niggaz (bitch niggaz) / Bitch-ass niggaz (bee-atch).
[US]Hip-Hop Connection Jan./Feb. 26: ’Bout three years ago I beat that bitch ass. She stopped stalking me too.
[US]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.