Leaky Locomotive 

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!"

Leaky Locomotive by theonewhoisbroken February 3, 2010

Rusty Leaky Locomotive

This is when you stand infront of your toilet naked while your female partner (unlike the regular Leaky Locomotive hangs on your shoulders facing you. As you Initiate vaginal intercourse your female partner takes a dump in the toilet.
*Warning* This can get very dirty.

Rusty Leaky Locomotive:
Bob: "Dude it go so messy last night!"
Frank: "messy, why?"
Bob: "We did the Rusty Leaky locomotive!"
Frank: "Woah!"

Rusty Leaky Locomotive by theonewhoisbroken February 3, 2010