Cargo train 

A person who picks up other people's problems while also carrying their own, because no one cares enough about them to listen to them. Probably also depressed.

I feel like a cargo train, I always listen to everyone but no one ever listens to me

Cargo train by Myearbudsgotstolen October 6, 2017

cargo train 

when you go on a massive bender it is also known as being on the cargo train. A group of people are riding the cargo train when they are together for a period of time consisting purely of getting f*cked up.

“Want to go to the cinema on Saturday?” “Nah I can’t, I’ll still be on the cargo train.”

cargo train by gollum123 June 3, 2018