The ancient Mach-1 Skytrains in Vancouver. The front and back of each car have a small door, and when looking at that in combination of the shape of the train around that door, it looks just like an outhouse. Not only that, it has been known in the past and still occurs occasionally, to function as one, where people will use the space of where the fold down seats are just behind the small door, to take a poo poo!

These old poop poo trains are also known as boobie trains, crying trains, chicken slaughter trains.
1. Oh no, I just got poop-sandwiched by the poop poo train, had I been a little earlier or later to arrive at the station I would have boarded a Mach2 or Mach3 train!

2. If you see a pair of jeans, clothing, or bag left behind at the "outhouse area" of the poop poo train, do not touch it! It is likely to be covering up someone's turd!

3. Guess the people who designed the train wasn't paying attention to prevent it from becoming a poop poo train!!!
by nimbys_suck October 16, 2018
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A toy train where human fieces are the engine and cars, twigs are used to connect them, and rocks are the wheels.
Jim Bob was so poor when he was a kid his parents could not even afford to buy him a poop poo train. But look at him now, he has a whole collection.
by ricflairismyfather October 7, 2005
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When you try to push out gas as you fart though your anus . But A combination of a fart and stool (shit) get pushed out at the same exact time through your butt hole . Wishing you were wearing a diaper .Producing an offensive smell
Holy shit ! Did Jesse just dust crop us it smells so bad he must of dropped a poop-poo air Biscuit on us . That prick ........lol
by Large in charge March 22, 2019
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