its when you and 4 friends pile into a little room, and take off your clothes. then everyone grabs the hips of the person infront of them. Then you turn the lights off and walk around the room, while saying train,train,caboose
last night me and 4 other people train,train,caboosed for like, 5 hours.
by smurfis February 02, 2006

6 Words Related to train,train,caboose

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