ride a train 

two guys (usually two friends) having sex with one girl at the same time

Me and my boy want to ride a train.

ride a train by suqnfuq January 6, 2008

Ride the A-Train

Taking LSD, whether it be in sugar cube, tab, marshmellow, or any other form.

Bro, I ride the A-Train so hard last night, I almost felt I could feel the sun.

Ride the A-Train by Jackbenimble7 November 17, 2009

RIDE THE A TRaiN 

1) Taking adderal to stay up studying
2) Taking adderal to party through the night

Hey you wanna ride the a train tonight

RIDE THE A TRaiN by pheonix fire183 May 19, 2006

Ride the D Train to A Town 

The act of a man participating in anal sex with a woman

Person 1: "How'd it go with your girl on the weekend?"

Person 2: "Great man, she finally let me ride the D Train to A Town!"

Ride the D Train to A Town by Reshmo August 3, 2007