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Running Train: 1. A train that is in working order, or is at the present time running. 2. Slang for working hard without any rest periods. 3. Slang for a group of people, usually men, possibly part of a club or group that have all had sexual intercourse with one woman/man, either during an orgy, or sequentially coupling with her/him over a short period of time. No compensation, except temporary popularity of the person who has been run train on, is ever given, and they are usually not held in high regard by their sexual partners post coitus. Example:
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