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Twopence ha'penny millionaire 

A person who pretends to have millions of pounds in the bank, but actually struggles to find a penny to scratch their ass with (A twopence halfpenny is the equivalent of pound sterling 2.5pence).

Usually walks around in fake designer clothes/clutching an imitation designer bag. Alternatively, they may have one genuine designer item with which they parade around with consistently. Can also apply to people who emphasise what they actually do have, or lie about what they have e.g. the size of their home/their earnings/the make of their car.
If being extremely stereotypical, it would be accurate to say that twopence ha'penny millionaires are usually insecure and rely on this behaviour to get attention or gain some credibility.
Girl 1: Ooooh, look at my new Louis Vuitton handbag, it cost £124930843025843
Girl 2: Hang on I swear you bought that out the back of that van in Turkey?
Girl 3: Yeah she did, she's not fooling anyone, she's just a twopence ha'penny millionaire

TwoPercentSkimm 

A legend of social deduction who's scumreading and misreading skills are unmatched.
TwoPercentSkimm is better than me at Town of Salem.
More from Urban Dictionary
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
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
After we broke up, he was floxi to me.
floxi by Dr. Geek May 13, 2009
Word of the Day on September 28, 2026
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