origionally from "Romeo Must Die" a phrase used to identify someone stupid and irritating. Someone who is worth less than you. Said between a mate and you, usually in hoarse voices pretending to be whispering but loud enough for the stupid person to hear. This creates maximum damage to the shiftless negro's feelings...but hey, they're a shiftless negro...they deserve it
P1: hey, you know that guy?
P2: ...shiftless negro?
P1: ...yeah shiftless negro, yeah, shiftless