having a heroin addiction, using Heroin
I can't donate blood, I'm Riding The H Train. I also have AIDS, but thats beside the point.
by Booger November 19, 2004
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Having sex.
More specifically, having sex to the point of orgasm.
"What were you up to last night? You didn't text back."
"Oh, I went over to Jake's and was too busy riding the 'O' train. Whoo whoo!"
by mexivanilla November 14, 2014
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The state of being somewhat intoxicated, but not completely shitfaced.
Lawrence took 5 shots before the basketball game, so he wouldn't be completely fucking bored the whole time. Lawrence was Riding the Buzz Train.
by Moby Bigdick March 12, 2010
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Having sex with a lactating woman (still full of breast milk)
"The milk train is comin round any time of night or day With two big headlights shining so you know the way
Picking up steam rolling down the track
Squirtin out juice on the caboose.
The brakeman's havin a heart attack"

"Man, I was riding the milk train last night. And I wasn't the only one who shot off. Don't go round hungry!"
by Twisted Fixtures June 29, 2007
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When someone takes the top of the pumpkin (aka vine, handle) and inserts it in their rectum while having sex with the face of a carved pumpkin.
by CelticMonk October 13, 2018
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A person who is feeling or who will be in an immense amount of pain. A somatic sensation of acute discomfort.
-Hey dude I just heard that Clay put Icy Hot on his ball sac, he's gonna be riding the pain train in a few minutes.
-Haha what a dumbass.
by C-Russ67 April 29, 2010
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