a guy who participates in running train on some bitch.
Van: "Hey look isn't that Bovice over there?!!!"

Orpheus: "Yeah, it is!!! Wow he is definetly the greatest Train Runner of all time!!! As a matter of fact me'n Bovice ran train on your sister last night!!!"

Van: "Excuse Me?"

Orpheus: "Bitch, EXCUSE ME!!!!"
by CHOWS April 6, 2008
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A girl that is designated to give head and/or have sexual intercourse with any male that would like it. A different girl is usually designated every weekend.
Thomas - Yo George, who's the designated train runner this weekend?
George - I think Sarah O'Connell, she loves running train man.
by morgan 9875 April 22, 2008
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