The first hit of the charred weed submerged beneath previously smoked ganja. Generally, the participant in the smoking session will lay claim to this patch of salvageable smok-age by calling out "i got nigger greens", loud enough for all his counterparts to hear.
Guy 1: "Yo the top o' this shit be cashed, yo."
Guy 2: "Let me get that, yo." *Blows off cashed weed."
Guy 1: "I got myself a hit o' Nigger Greens!"