the state of being so drunk you shit your pants. the shitting usually takes place with underware on, and while laying in a bathtub. unleashing the a-train usually happens after taking a-bombers.
dam man jimmy took 3 a-bombers, 11 beers, and a couple rips pff the bong and then didnt have a choice but to have the inner a-train come out.
by jake suppa February 10, 2008
Get the a-trainmug. 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
by smurfis February 2, 2006
Get the train,train,caboosemug. Not only the coolest transportation ever but now the coolest slang word ever. Instead of using "sketch," "kosher," "sick," ect. use train!
by hey you punk July 31, 2016
Get the trainmug. When someone decides to vape in a moving car (driver or passengers), with the window rolled down. This gives the illusion of that the car looks like a steam train.
by tylathenerd July 11, 2019
Get the Trainmug. Let's run a train on this whore
by ESTELLA VICTORIA BELL September 18, 2016
Get the trainmug. A train is when you have sexual intercourse with a partner from behind and proceed to grab their behind and shout Choo-Choo
Oh man, last night I had sex with with this woman who had a caboose like a mack truck! I got so excited I couldnt help but yell choo-choo like a Train, while I did her doggie style!
by Defnotyourname September 2, 2018
Get the Trainmug. by Niceness April 22, 2006
Get the Trainmug.