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butt fish 

(verb): sperm that live in the anal cavity after being deposited by the donor along with seminal fluids through anal sex. They remain in the rectum swimming around, occasionally swimming out of the anus and often being pushed out by feces. They can live inside the host/hostess's body for three to five weeks before they die, often of malnourishment. They are carniverous, eating other sperm, until one "fish" becomes the dominant head. Though harmless, besides the occasional constipation, butt fish can become an embarrassment and the subject of constant joking and mockery towards the individual who acted as the host.
Green Lantern: Did you hear that Wonderwoman had butt fish?

Wolverine: Haha, no way, who gave them to her?

Flash: I heard it was Superman, he boned her so hard she won't shit for weeks!
butt fish by Martypastmidnight January 13, 2011

butt fish 

1. Adjective used to describe a female who smells of both butt and fish.

2. Adjective used to describe a male who smells of both butt and fish
That chick smells like butt fish (Taint)

That dude smells like he just got some from butt fish girl.
butt fish by Robert Rene January 11, 2008

Fish Butter 

A fish scented slimy substance secreted from a woman's crotch, made of dirt, sweat, and vaginal lubricant.
"Damn, that girl sexy as fuck but she got fish butter"
Fish Butter by darkjanggo June 10, 2016

Fish Butter 

A thick white substance that collects on your unsheathed dick during sexual intercourse; crab paste; dipping sauce; salmon tears.
'I was fucking some girl last night when I suddenly realised I couldn't see my cock for all the fish butter.'
Fish Butter by Tund March 6, 2008

fish butthole 

It's like a butthole but on a fish

fish butthole 

its ,like a but hole but for a fish