A sexual act much like the beloved Tugboat. In this version, you are required to pull your partner's penis straight forward while leading them around the room and blowing cigarette smoke circles in the air. Exclaiming "Choo-Choo" loudly and dressing as a train conductor are both optional.
"I'm sore today, Danielle wanted to do the Locomotive last night. Let's just say it was an express train. Ouch."
by Royal Cunninglinguist Society January 30, 2009