Where two or more guys have sex with a girl at the same time.
We are going to run the train on Jenny tonight.
by unknown February 4, 2004
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When lots of guys line up behind a girl to tear that ass up!
Feliesha gets jealous when Dustin hangs out with his friends even though she lets lots of guys run a train on her every day.
by Lose the Bitch! September 3, 2003
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A euphemism for a gangbang or a gang-rape.Some here are afraid to admit that it refers to rape and say it is VOLUNTARY.It is safe to say it refers to either group sex or gang rape.This word is usually used by gangstas and thugs.

Watch the TRAINING DAY scene when alonzo stops the white kids in the gang neigbourhood.
Denzel W(Alonzo):I'ma make you walk home. I'ma let the homeboys run a train on your girlfriend. You know what a train is, don't you?

some actor(driver):(wimpy voice)Yes.
by stevewill March 13, 2008
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when you and a couple of friends have sex with the same girl at the same time
" damn dat bitch thick"

"yeah we running a train on dat bitch"
by keiland b February 7, 2009
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When a group of three of more people (regardless of gender) take turns preforming or receiving sexual acts from one person( of any gender)
Brett’s girlfriend gets angry when hangs out with his friends even though she lets lots of guys run a train on her daily
by Snailbob September 12, 2020
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Can't be less than 4 males + 1 female in VOLUNTARY sexual intercourse NOT rape or any of that chump sh*t
My crew is so fly every girl we meet lets us run a train.
by PhillyNigga12inches February 4, 2006
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