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A false 9 is a position in football/soccer. The player playing false 9 position is normally a striker who drops back to the midfield to disturb the defender of opponents by drawing out players, and with good passings, and dribbling.
Messi was a brilliant false 9 under Pep Guardiola.

Falsehood 

*debate time*
Virgil: your mom is preposterous

Thomas: ok lets leave the moms out of this considering that neither of you have a mother.
Virgil: if she did exist, she’d be preposterous and pointless
Logan: FALSEHOOD!!!

Falsetivity 

Untrue, Wrong, Incorrect, Made-Up, Unfaithful, Disloyal.
Sephiroth is the debate winner since there is no falsetivity in his argument.
Falsetivity by Zie016 September 17, 2013
Origin:
Monday 25th July 2016,
Ferny Crofts Campsite,
New Forest,
Hampshire.

A follet is an unfortunate and badly timed erection, for example during an outdoor activity for everyone to see. A follet must also be followed by continous piss taking and references, otherwise it is only know as an awkaward boner.
Harry was embarrassed as everyone saw his raging follet, he tried to hide it but his efforts were futile, his raging follet was there for all to see.
Follet by Sam Lancashire July 29, 2016

False Start

When someone is still hung up on their EX, while dating another person creating a false sense of reality....and giving the new relationship a bogus, False Start.
I specifically asked you if you were over your EX, and you told me yes......then i find you still writing poems about him, and wishing him happy birthday, when you ruined mine. That is a complete False Start to our relationship, and you wonder why we struggled ?
False Start by GIRTHQUAKE72 November 18, 2019

Junk Folder 

A woman's vagina. Where men want to put their "junk".
When she told me she was wearing matching bra and panties I knew I was going to be filling her Junk Folder.
Junk Folder by Boozecoma December 16, 2014
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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