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1/4 of an ounce. Usually for drugs.
"Ay you got me with the fourth for $60?"
Fourth by ChiefBeef300 June 5, 2018

Fourth of July 

A celebration of the time the Americans gave the british the biggest L in the history of Ls
British person: “Why is it spelled ‘cancelled’ in the U.K. ‘but canceled’ in America?”
American: “We gave you the L in 1776 on the Fourth of July.”

fourth street 

An area of Alton, IL natorious for cheap nasty prostitutes.
"I saw your girlfriend on fourth street."
fourth street by Dot January 4, 2005

fourth dimension 

The fourth dimension is time, as defined by Einstein in regards to the Theories of Relativity. The Spatial dimensions are those of height, length, and depth. The fourth dimension can be related to a hypercube, much as the first dimension is related to a line, the second two lines connected at perpendicual angles to one another, and the third dimension being a cube. The fourth dimension is(sometimes) associated with the space-time continuum.
It is truly inane to travel to a universe that is based only upon the fourth dimension, as that woould include only time, and no being could truly exist.

Fourth Vorn 

The Forlorn Vorn. The lusted-after coming age of terror and chthonic despair.

Will be ushered in at the Breaking of the Third Vorn - the Vorn of the Homochrist, which will be sooner than you think.

At this cathartic point, the poofternicious stranglehomold of egalitarianism, socialism and Christianity shall evaporate and be replaced with the most baleful and universal acknowledgement of the Necrowizard's bleak eternal supremacy of frost.
By Vorthak, my droogs! This pathetick homoverse breathes its last! And we are privileged enough to be bidden to its fall! ALL HAIL THE FOURTH VORN OF PERPETUAL BLASPHEMODESOLATION!
Fourth Vorn by Lord Grimcock October 17, 2008

Fourth Base 

When you refer to your other intimate moments with your partner as first, second or third base, yet you have forgotten that the next step is referred to as a "home run", and is not called "fourth base". Yes, fourth base is sex, but come on! Just call it a home run! All the other bases are used in a reference to the bases is baseball. Have you ever played baseball? There's no fourth base!
"Dude, I totally got to fourth base with my girlfriend last night"

"You mean a 'home run'?"
"Yeah, either way we totally smashed".
Fourth Base by slurpeesaredelicous January 8, 2017
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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
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