The act of masturbating over an extended period of time, usually an hour, in which you simulate multiple sexual positions to increase your stamina.
Carter hadn't slept with anyone in a while, so when he though he might get lucky, he did a training run to get himself ready.
by donthinkso May 11, 2013

by No.52 October 2, 2016

by Analcheesedick October 2, 2016

by vindex parsley April 27, 2011

by Lucario6669 October 2, 2016

Variant of "run a train", which refers to a line of men each successively having sex with the object upon which the train is run. Used in this sense in the engineering world, where signal processing (dealing extensively with the impulse train) can be extremely complicated and confusing, and such material is said to thus "run an impulse train" on the student/engineer.
by Crusting Beaver November 14, 2010

A threat that has sexual implications. Where a group of men gang up on one guy and fuck his ass as a train/tag team. Often resulting in severe bleeding and bruising.
by Fact man May 9, 2018
