A drink consisting of 1 oz. of raspberry liqueur and 1 oz of rootbeer schnapps. Served in a high ball glass with ice, and filled to the top with ginger ale. Usually drank obnoxiously, with accompanying conductor gestures and train sounds.
Man, I had five pain trains last night and I didn't feel it until it was too late.
Pour me another pain train, muthafucka, whoo whoo! (gestures like train conductor).