bum train 

when 3 or more guys all have anal sex together in a row

i had a bum train last night, there were 8 of us

bum train by robin November 11, 2003

Bum Train 

Line up and take it up the bum! 2,3,4 or better still more, all get involved in the Train of Bum. It's not Gay, it's just constructive exercise between mates.

Anyone can make a woman scream. It's takes a real man to make a bloke scream like a little boy who's been stung on the finger by a wasp!

Instigator: "Who's up for a Bum Train later on tonight?
Everyone else: "Too right, rate 'ard."
Instigator: "Bags' in middle!!!"

Bum Train by Marv Sharpe March 19, 2008

train bum 

Those bums that be on NYC trains that wear layers of cloths and a big druid blanket in the summertime and smell like they haven't taken their pants off in 15 years not even to use the bathroom.

Homie you smell like a train bum.

train bum by Angel_Dirty_Face December 22, 2014