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
fifties term for a cheer
"we all had to stand up in the grandstand and give him a locomotive" (salinger 16)
by pbbt September 25, 2007
Loco comes from the spanish word Insane; crazy or whom's mental abilities are questioned.

Thus, Locomotive means the true motives on which that deranged person is acting the way he/she is.
Yikes; I was not aware of his Locomotives.
by K/P November 18, 2009
faggot on thecorpse.com
that fuck locomotive is a fucking faggot.
by kancer December 09, 2004

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