Oyster soup 

when a homeless person inserts an oyster inside of their anus to be eaten during a soup kitchen

Bob's oyster soup was truly delectable during our last soup kitchen!

Oyster soup by Dr. Haydens March 4, 2022

Oyster Soup 

The act of performing cunnilingus on a pregnant woman being interrupted by her water breaking.

I was going down on Pregnant Peggy when her water broke. Oyster soup all over my face.

Oyster Soup by TheBrettMan April 23, 2011

Oyster Soup 

The act of a guy jerking off into his bellybutton, sprinkling in oregano, then scooping the mixture into a shot glass to drink it once it becomes room temperature

"Last night I was hungry AND horny, so I made some oyster soup."

Oyster Soup by SloopingSlewBear March 2, 2018

Making oyster soup 

Licking and sucking on a clitoris to make a woman very hot and very wet.

His tongue-flicking and persistent sucking made her engorged clit stand out like an oyster in a delicious, fragrant, steaming cup of liquid. He was making oyster soup.

Making oyster soup by mtspacey March 2, 2011