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.
While wearing a Condom for your safety, you dip your cock in Tabasco sauce then jam it in a woman’s ass. The burning sensation that was caused by your submarine would be as if a nuclear bomb went off in her ass!!!
She screamed in pain when I gave her the Nuclear Submarine!