"1 (after seeing a very fast moving vehicle) "damn, they're runnin a nig train
1) anything moving at a rediculously fast or hard pace/ out of control  2)a gathering of many people all going somewhere at once, usually being overpacked in a car
""1 (after seeing a very fast moving vehicle) "damn, they're runnin a nig train" What is the definition of "nig train"?