"Pull a train" nghĩa là gì?

"Pull a train" = kéo một đoàn tàu -> (tiếng lóng) nghĩa là quan hệ tình dục tập thể (giữa 1 phụ nữ và nhiều đàn ông).

Ví dụ

According to a report issued by the Association of American Colleges in 1985, “pulling train,” or “gang banging” as it is also called, refers to a group of men lining up like train cars to tale turn having sex with the same woman.

I was the kind of girl they never introduced to their families and only to their friends if they were planning to “pull a train”. That's what guys called it when they would have sex with a girl and then allow their friends to have sex with her too; one after the other. 

The scene that made the biggest impression on me at the time, however, was one where a bunch of roadies (nhóm phụ trách nhạc cụ) pull a train on a plane—that is, they take turns having sex— with a groupie while The Stones stand around watching in a bored manner, beating bongos (trống).

And every time he goes to the joint (ổ lưu manh) he listens to those degenerates (suy đồi) talk how about they're going to kick some woman's ass until she gets on the street for them and makes them some money, or how they're going to pull a train on some retarded (chậm phát triển) girl down the block - every sicko (bệnh hoạn) fantasy in the world.

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