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An exclusive group of individuals which have engaged in intimate encounters with strangers while on board a passenger train, most commonly in the bathroom compartment of the train; similar to the Mile High Club.
Gloria met a very special gentlemen on board the 4:15 Amtrak from Penn Station to Providence last month, and she was delighted to have joined the Third Rail Club with him. He still hasn't called.
by BostonBaller September 11, 2009

Words related to Third Rail Club

amtrak mile high club penn station promiscuity sex