Sahara submarine 

The Camel, a horse designed by a committee, may be correctly called a "Sahara submarine". This moniker is a derivation of the term "Ship of the desert". It referemces the fact that camels are frequently jambpacked with arab seamen.

"I'm not going to waste a 3 million dollar cruise missel, just to blow-up a tent and a couple of sahara submarines."

Sahara submarine by Jim Inman August 16, 2006

nuclear submarine 

When defecating, the biggest, most awesomely large dump that you haven't had in a good long time. Usually arises from not crapping for more than 48 hours or when coming off of constipation. Called so because the waste is so big, it's like a nuclear submarine trying to leave the bowels, which is a very large submarine. An atomic dump.

Today I went over Memere's house and launched a nuclear submarine.

Try as he might, the nuclear submarine deep in Gorby's colon wouldn't come free, until he had some Taco Bell and it was launched in the public restroom.

nuclear submarine by Braveheart's thirst for blood July 20, 2007

Yellow Submarine 

After you blow your load inside a chick's ass, you piss in her ass with your barnacle cock, and it lubes up clumps of shit and the clumps slide out like submarines into the yellow water.

"Holy shit Sam, did you hear about Nick and Heather last night? He drowned her gaping ass in his piss and made some yellow submarines.

Yellow Submarine by taint man 3000 June 7, 2009

yellow submarine 

When a guy pisses inside of a girl while having sex.

Herb gave Joan a yellow submarine.

yellow submarine by Whitey n Out December 20, 2006

Yellow Submarine 

When you peel a banana, take the peel, shit in it, and then you insert it into the vagina, then you squeeze the peel, causing the shit to leak into the vagina.

Dude, this chick i was fucking asked me for a yellow submarine.

Yellow Submarine by B-rax April 8, 2008

Awkward Submarine 

Commonly mistaken for a certain action, mimicking a submarine out of water in order to break an awkward silence. Contrary to common belief, an awkward submarine is when you have an erection.

Guy 1: "Umm... please tell me that's not what I think it is..."
*awkward moment*
Guy 2: "Uhhh..... awkward submarine..."

Awkward Submarine by pseudophilia June 9, 2011

Red Submarine 

When the guys penis turns red because the condom is too tight

Stacy: "Oh Claire did you and Mike get down to business?"
Claire: "Yeah we did, but Mike bought the smaller condoms by accident so it was like a red submarine in my ocean"

Red Submarine by noodleboodle January 31, 2017