The misfortune of pulling out during anal sex to be followed by a "coal car" (a.k.a. fecal overflow). To complete the maneuver, one must ejaculate on the bloody fecal matter, the aftermath resembling a train wreck.
My roommate Karl ruined my sheets after he pulled a Montreal train wreck on that skeezer. (Based on true events.)
by Longshanks Blumpelstiltskin May 28, 2006