Train

[Sarah]

A group of guys stand in a line outside a room. One by one, they enter the room to have sex with one girl inside. The line must have at least 7 guys to be qualified as a train.

[Sarah]

To run

[Sarah]

Something Bruno Mars would jump in front of.

[Sarah]

It's a transportation vehicle.

[Jessica]

Teach (a person or animal) a particular skill or type of behaviour through sustained practice and instruction.

[Britney]

To [run a train] in sexual terms means that a group of men wait to have sex with one girl. Usually it does not qualify as a train unless there are more than 7 men involved but the term train is used to describe any number that is [more than 1] with a female. The female has sex with a man and after he cums another man enters the room to have sex with the female and so forth. It is only considered a train when the woman is fully aware of the situation and allows for the men to have sex with her. Otherwise it would be considered rape.
Differs and is often confused with [gang bang]. Train involves sex with one person at a time while gang bang is when a group of males having sex with a female at the same time.

[Sommer]

The vehicle that [moves] fast and [choo] [choos].

[Cami]

An activity usually involving multiple males and one female. The males usually take turns fucking the female and just then [switch off] after they get their nut in. An [avetard] gets extremely [horny all the time] and always thinking of this activity with any female he sees.

[Justin Bieber]

Doing [two lines] of cocaine simultaneously, one in each [nostril]. Also known as [riding the rails] or skiing

[Lanell]

When a girl have sex with more than [one guy]. Normally guys would [line up] or wait for one another to [get done]. Participants would go in the room one by one to have sexual intercourse with one girl.