The submarine 

When you do motor boating but with said persons butt cheeks instead

The submarine this guy had taught me to do was new and innovative.

The submarine by JustuhNobody March 9, 2020

The submarine game 

The player lays on their back in the bathtub and attempts to make only the tip of their dick peek out of the water like the periscope of a submarine.

Mai: You sure took your time. Were you thinking about me or something?...

Sakuta: Actually, I was just engrossed in playing the submarine game

The submarine game by karabu_ February 20, 2019

The Billionaire and the Submarine 

A sex game where a woman sits on a man's face and slowly crushes him to death while he loses oxygen

"hey baby, wanna play the billionaire and the submarine?"
"Sure baby, take a deep breath"

The Billionaire and the Submarine by A_A_Ron85 June 26, 2023

The Sydney Submarine 

When snorting coke off a toilet seat in a certain popular Sydney nightclub, some coke may drop and plop inside (unaccompanied or not by bodily emissions). The process of fishing it out is known as The Sydney Submarine

John was a uni student, he dropped his bag of coke in the toilet and had to do the The Sydney Submarine

The Sydney Submarine by toddbuster December 16, 2015

The Yellow Submarine 

The act of urinating directly into a girl's butthole. In many countries completing this act is the first step into manhood.

So I was buttfucking this chick last night and really had to piss, so I just gave her The Yellow Submarine. It was really messy but totally worth it.

The Yellow Submarine by Slam Jr. December 17, 2008

the russian submarine 

The process in which a man, or woman, chugs a bottle of hard liquor while ramming a girl from behind while hacking into a computer.

I brought a girl home from the bar and gave her the Russian Submarine.

the russian submarine by Sadface February 1, 2018

The Yellow Submarine 

When you smoke weed out of your asshole, lighting and inhaling the weed through your asshole, while a girl sucks you off and you exhale the smoke through your penis, so she can therefore get high as well.

"I hate my life." "Hey, don't be sad. lets " The Yellow Submarine" our problems away. Got any weed left?" "Hell yes"

The Yellow Submarine by Cell: Y+B Vanish= HELLOOO-DBFZ April 8, 2018