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3.
When sitting on the porcelain throne, preparing to drop some deuces a steady stream of fart air emits from your bunghole, sometimes pinched enough to emit a squeaking or whistling sounding fart announcing the turd train a'comin until the poo seals off the space and stops the whistle
Fuck dude, i could hear your poo choo train comin down the tracks from out here
by Colonel Skadoosh November 06, 2009
 
1.
Lyrics:

Mr. Hanky: "Poo-choo trian's layin' down its tracks, with a POO! CHOO! all the way and back!"

Eric Cartman: "Poo-poo train is my favorite thing! Spreading Christmas joy as we ride and sing!"

Mr. Hanky: "Christmas time wouldn't be the same, without hugs and kisses and a poo-choo train."
"Christmas time wouldn't be the same, without hugs and kisses and a poo-choo train."
by Phillip Evans December 23, 2004
 
2.
Train made out of turds; created by Mr. Hanky on South Park as a way to reach the North Pole.
Hey kids, let's ride the poo-choo train and go see Santa!
by RatchetBoo July 07, 2003
 
4.
the act of manking your male friend in the bunghole who buys drugs for you from a gay dancer
Hunter likes to poo choo train James while watching gay black porn that his brother downloaded. After that, Hunter also likes to poo choo train Stretch, also while watching gay black porn but when with Stretch, likes to stick staplers and random objects in his bunghole.
by Norbert Cotthead April 15, 2006