What does run a train through a girl mean?

Question

i heared it on a movie and i wanted 2 knoe what it means

Answer 1

I think it's when a guy has s*x with her in the back and she is performing oral s*x on a another man in the front.

Answer 2

it means to **** her hard with the d**k  

Answer 3

Its when a bunch of men like 2 or more have s*x with a girl all at the same time. Its really nasty