A sexual act / contest in which three or more men (or women with a strap on) perform anal sex on each other in a line. The member of the train that has the most fecal matter on their penis is the winner. The loser is the person from whom the winner has just removed their penis. The penalty for losing is that the loser must clean the penis of the winner by whatever means the winner requests.
Peter thought he was going to have a great night with his buddies until he lost the Chattanooga Poo Choo.
by Harry G. Balzak October 18, 2011