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A woman who has sex with her ex boyfriend the day after she breaks up with her current boyfriend, or a woman who shows her breast to get a man to go swimming
A.Fish is a dirty whore he cares about no one but herself and has sex with her ex boyfriends a day after breaking up with there current one.

a fish in a plastic bag 

Under the knee of the police officer, the suspect was likened to a fish in a plastic bag. It was over.

a fish inside a birdcage 

Someone who has all the skills and knowledge to thrive, but due to circumstance, their surroundings, and the people and things their surrounded by, they will likely never live up to their potential. They will often feel inferior and insecure because they don’t seem to fit in, and don’t have the same abilities as their peers.

A fish has all the qualities and abilities to survive and thrive, but are helpless out of water, that’s where the saying is supposed to mean on a literal level, but on a figurative level it means someone who has skills and abilities that may be unconventional or less socially acceptable, and are pressured to fit a mold that doesn’t work for them.
Alice is a fish inside a birdcage. She has incredible potential, but she hangs around shitty people who don’t support her, and she keeps trying to fit in where she doesn’t truly belong.

A fish pole 

Its where two guys attach the piercings on their penises together and pulls up on the base of the penis while aroused.
Jeff and i tried A fish pole, It hurt.
A fish pole by WhothefkRu June 16, 2011

A Fish Truck Sign

A kind of person that tries hard but may fail horribly.
That guy, he is a fish truck sign right? Well, he is doing his best...
A Fish Truck Sign by CosmicFish October 15, 2018

boxed like a fish

when sapnap exists you tell him he’s boxed like a fish, because he sucks
you’re bad? you’re dogwater? you’re freer than a costco sample? you’re boxed like a fish? you’re freer than a public bathroom? did i ask? any askers? from the makers of frozen 1 comes frozen 2?
boxed like a fish by karl jacobs :) January 17, 2021
More from Urban Dictionary
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026

Slop Grenade

When someone uses AI to generate a large document, slide deck, or piece of code/software and tosses it over the fence for you to deal with.
Chad: Hey Brent I sent you the new backend API change to review, it’s only 100 files changed.

Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
Word of the Day on September 29, 2026
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