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 cigarettesmoke 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."
That being the sounds of someone being finger blasted at increasing speeds, with their wetness or lubricate orifice, that the sloshing sounds, sound like a locomotive/train pulling off from stationary. only for them to howl out in a staggered manner of breathlessness to mimic the sound of a locomotive/train horn.
She explained to her friends that she felt like a 'locomotive' after the fast paced finger blast