The process of gathering up a bunch of your friends to gang bang somebody.
Man, that girl at Chili's has a fantastic ass. Let's run a train on her!
by stale January 4, 2003
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Not only the coolest transportation ever but now the coolest slang word ever. Instead of using "sketch," "kosher," "sick," ect. use train!
You: I just got bit by a Chik Fil A soup!

Me: Train!
by hey you punk March 11, 2016
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When a high level or faster player attacks many monster to attain their aggression , direct them to another player (normally a lower feeble player) and log out. Log in and get the lewt taht the player drops.
omgz train, run away!.
by Dan Clow January 19, 2007
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To teach someone a lesson by either beating their ass or denying them something they want very much.
Usually the "training" is done to adjust someone's attitude about performing a certain activity and thus ceasing to do it.
"I trained his dumb ass by knocking his teeth in when he broke into my house."
by MB Mart--z February 5, 2003
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When 2 or more people share the same person sexually often in the same night this action is referred to as a train, a train can be as many as 7 people sharing one girl or boy
Aye man we finna rain a train or Olivia or nah ?
by readyboy March 6, 2018
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