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Human rat 

The term human rat is derived from groups of people that have no apparent critical thought process. Human rats conform to all social norms whether it’s based in reality or not, while also embracing a life of poverty. Human rats can be submissive to government and authority especially if threatened with fear based trauma. Usually human rats do what ever they please disregarding others well being. Human rats are a variety of a gridder, homeless person.
That human rat just tried to break into that car then he ran off into the city streets
Human rat by SlimeOnTheBlock April 28, 2023
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Human Sciences of Reason and Rationality

A field that uses history, philosophy, literature, and art to understand how concepts of reason and rationality have evolved and how they have been used to exclude or empower groups. It examines the genealogy of “rationality” from Enlightenment to the present, its representation in cultural texts, and its ethical complexities. It also critically engages with the boundaries between reason and emotion, reason and madness, reason and intuition.
Human Sciences of Reason and Rationality Example: “His human sciences of rationality work showed how 18th‑century European thinkers constructed ‘reason’ as a universal faculty while simultaneously denying it to women, colonized peoples, and the poor—a contradiction that haunts rationality discourse today.”
More from Urban Dictionary

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
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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