1 definition by Dozr

If your subway stop is full of commuters, and the trains pulling in are full, you get on a train going in the opposite direction in order to board one stop earlier. Guaranteeing yourself a spot on the train.
The trains and the platform were packed, so I backstopped, and got on the next train no problemo.
by Dozr June 14, 2007
Get the backstop mug.