1(a). To signal (the driver of a racing car) to proceed immediately to the pits.
1(b). The
act of hanging a black flag from your car
window to let other divers know to get the hell out of your
way and take their asses back to the pit stop.
2. The act of waving a gun before discharge.
Rick Ross: "Yo let's go tear through town in your Benz and intimidate
people. We need to get out here grinding."
DJ Khaled: "Word We'll go
Black Flagging today at
4:20; we takin' over! deuces!."