Top definition
This is when you stand infront of your toilet naked while your female partner leans over the toilet with her ass facing you. You initiate Anal intercourse just like the standard missionary position except she will start to urinate into the toilet as you go in her ass.
Leaky Locomotive:
Bob: "Dude it go so messy last night!"
Frank: "messy, why?"
Bob: "We did the Leaky locomotive!"
Frank: "Nice!"
by theonewhoisbroken February 03, 2010
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