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- Universal Pollution
- Ultimate Pollution

Describing someone who is polluting the earth with his face. (Same as V.P- Visual Pollution)
He is such a U.P..
Stop polluting the Earth, U.P.!
U.P. by Universal Pollutants October 11, 2018
Shorthand for "user/pass" or "username/password."

Generally used among 1337 hackers or IT professionals when discussing user credentials.
Ok, it's set up, the u/p is john123/password456.
U/P by WerriamMebster July 19, 2010
U-ndercover P-artyer Someone who is quiet most the time usually at school but knows how to party on weekends.
Hes a major U.P. NUKKA!
U.P. by CHILLZ1127 June 11, 2006
Acronym for Unofficial Patch: a series of bug fixes, texture adjustments and just general gameplay tweaks to games that are publicly modifiable. These patches are not offered with retail copies of the game, and U.P.'s are usually made by skilled game modders or modding projects/collaborations, and not the game developer itself.
The Unofficial Skyrim Patch is an U.P.
U.P. by Unit-Omicron January 26, 2015
-Universal Pollutant, refer to somebody or something which is polluting the world. {U.P}
-Ultimate Pollutant
U.P is banned in any of our class WhatsApp group.
U.P by Anti- Pollution October 13, 2018
A spinoff of the term "A.I." or Artificial Intelligence, a "U.P.I." or User-Provisioned Intelligence" is any user-configured, programmatic entity with the capacity to perform tasks like its specific user would. This might include any of the visual, linguistic, behavioral, or decision-making operations an A.I. would perform, but done in a way characteristically identical to the manner of the user being emulated.

A U.P.I. might be a robot you teach to wash and fold your laundry exactly the way you like it, or a piece of software you train to respond to your emails.
Jennifer's intelligent doorbell was equipped with U.P.I., so as I pressed its sleek, glowing button, it quipped back at me in an all too Jenny-like sardonic tone, "Wait.”
U.P.I. by Otomo Money June 2, 2018
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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