Rusty Submarine 

When a girl pulls her pants down (her cheeks loomin' over yo' erect dick), pops a squat, and straight up takes a massive, gravy shit on the tip of your penis. Like, not even in a sexual way. She just has to poop.

Ted: "You remember that machine Wonka drove down the chocolate river?"
Bill: "The boat?"
Ted: "Yeah. I was trying to remember why I was thinking of that boat, and then I realized.. it looked just like Paul's dick after Becky gave him that rusty submarine this morning.

Rusty Submarine by GreatMcGoogler March 30, 2015

Vaginal Submarine 

Penis

With his vaginal submarine, he knocked at her door.

Vaginal Submarine by People Who Love Games [PWLG] April 15, 2015

indian submarine

When you call a support call center, and you can't understand what they're saying so you shove the phone up your ass and fart loudly to see how they feel.

I tried to fix my computer yesterday and couldn't understand what the fuck they were saying, so I gave myself an Indian submarine.

indian submarine by Dickcheeseforrabbits August 13, 2017

butt submarine 

Heavy fecal projectiles that's surfaced in the toliet after being launched from the anus usually after a long traffic jam in the intestines

Bob finally released some butt submarines after the bottleneck in the bowels begain to break up

butt submarine by BIG T 49 January 30, 2021

Kevin's Submarine 

PAIN PAIN PAIN PAIN

Kevin's Submarine causes pain

Kevin's Submarine by pluck my pubes September 1, 2020

San Francisco Submarine 

A sexual act which one participant presses their anus against their parther's anus and poops a log directly into their partner's open anus. The turd moves like a submarine from one body into another.

I met a sailer named Pat. After topping him he who gave me a huge San Francisco Submarine. It was long, hard, and full of sea men.

San Francisco Submarine by Adimus Prime December 15, 2021

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