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Hippie haircut 

When you set your hair on fire, or at least singe it, while trying to light the bong. Especially bad if you’re a long haired greasy hippie, you’ll end up looking like ghost rider. That’s why you should get a haircut you god damn hippies.
They’ve been telling Hippie Steve to get a haircut, or at least take a shower for years now, but he didn’t listen. Then one day while trying to enjoy the marijuanas, unwashed for days and extremely greasy, his hair went up faster than nascar. That was the most brutal hippie haircut in the history of stonerhood. RIP Hippie Steve.
Hippie haircut by A WHITE GUY April 19, 2021

Get a haircut, hippie! 

An expression used by chavs to express their hatred for anyone with an IQ higher than 20. Hanging around in groups of at least five, they wait around street corners eating Maccy D's all day until one of them plucks up the courage to shout to a stranger "Get a haircut, hippie!". This will often be followed by any kind of comeback, witty or not, of which the chav will be unable to reply.
Chav: Get a haircut, hippie!
Person: Can't afford one... got any money?
Chav: Err...
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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