When a person driving a car in the far left lane turns a corner and extends to the far most right lane and then quickly shoots back to the left most lane. A turn where a person extends to the far lane and then comes all the way back to the inside lane. A turn where the person far overextends and then cuts it back to the inside lane. A wide arching turn that covers every lane, instead of following the lane you're in throughout the turn.
Could possibly have been coined because of blacks in the early 60's financing Cadillacs and being unable to drive such a big car, necessitating a wide, arching turn at intersections, causing racists to call it a "Nigger Turn".
Guy #1: Holy shit, dude! Did you see that? That guy turned the corner into the far right lane and then cut it back to the far left lane!
Guy #2: That was a major Nigger Turn!
Guy #1: He covered every lane with that turn... biggest Nigger Turn I've ever seen!
Guy #3: That was an Asian guy, not a black guy!
Guy #1: Dude, it doesn't matter what color person is driving the car, if you turn and sweep every lane, that's a Nigger Turn!
When driving in a vehicle, mostly a car, as you approach a turn, speed up to about 50, slam on the brakes, hit the turn sharp so you almost curb check, and gun it when you are done turning.
"Damn Boyle, That was hell of a Nigger Turn"
"Don't Nigger Turn into my driveway it fucks up the curbs jackass"