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underglow 

a very cool band from the Lincoln area. Go see them they rock good
Underglow they are ace
underglow by dave the god October 3, 2003

undercrown 

In porn, the camera shot where all you see is the dude's asshole and balls slapping against whoever they are fucking
Man: I'm just trying to get off, I don't want to see this undercrown shot in my vaseline stroke.
undercrown by baller722 November 26, 2013

Undercrown 

The shot in porn where all you see is the dude's asshole and balls slapping against whoever they are fucking.
How am I supposed to watch porn when all I see is Undercrown?
Undercrown by thatguy1645 November 26, 2013

Underground Aussie Hip Hop

A non-commercialised non-profit Rap scene. A style of Australian rap music where rappers choose not to 'sell out' to Record Conpanies & instead produce their own Recordings whilst maintaining other forms of financial income.
Guy a) bro, u know any good Underground Aussie Hip Hop beats?

Guy b) yeah sus out #undergroundaussiehiphop on Instagram! Google Celebrity Pete Laan is a fan of that shit

undercrown 

An undercown is that shot in porn where all you see is the dude's asshole, and balls, often switched to right after some hot and heavy action, in order to make the viewer dump his load to the view of a man's sweaty balls
I was jackin it to some pron last night and right before I came they switched to an undercrown ... Am I gay now?

Underground 

Un•der•ground (un’der ground’), n., adj.

1) A genre in music and other forms of media intended for an elite audience, that is often characterized by its high levels of originality and experimentation, and does not conform to typical standards, trends, or hypes as set by the popular mainstream media.
The mainstream media has a tendency to steal new ideas from the underground.
Underground by Essix April 16, 2005
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
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