Commonly referred to in PC-speak as 'Reverse' Racism, Crow Jim is precisely what it implies: racial discrimination against whites by black people. This is usually borne out of perceived racial inequality, rampant poverty and corruption, or as a simple act of misdirected vengeance for the South's segregationist attitudes and policies before the Civil Rights Era in the 1960s.
P1: "Man the Po Po stopped me again!"
P2: "What's that, the fifth time this month?"
P1: "Yup, they're Crow Jimming us again."
P2: "Fuck this shit! Screw New Orleans, we're moving to Albuquerque!"