Man, you shit on Hitt, get yo' shit bust, plus
Pistol-whipped, cover it up, use yo' bitch's blush

from Dr. Dre (Ft. Snoop Dogg) – Bitch Niggaz Lyrics on Rap Genius

If you talk bad about him you will get beaten up and knocked with a pistol. “Bitch niggaz” are acting like bitches (girls) so it would be natural for them to cover the bruises with make-up.

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