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The magical page. This page states that Lupin is a werewolf.
Snape: Turn to page 394.
Harry: *turns to page 394*
Harry: It says that Lupin is a werewolf.
Hermione: What?
394 by FCCRickRoll250 December 3, 2021
Related Words
The page about the difference between warewolves and and Animagi.

Used in defence against the dark arts
Potter, turn to page 394
page 394 by This account is fake November 16, 2017

Interstate 394 

A 3-digit spur route off I-94 in Minneapolis, Minnesota. It connects 4th St/Washington Ave/3rd St (the actual end of the freeway is uncertain to me) to I-494. It is about 10 miles long. Between State Highway 100 and Interstate 94, there is a "high occupancy vehicle" lane which in the morning rush hour is used for eastbound traffic and in the afternoon rush hour is used for westbound traffic.
This is like my favorite freeway number of all time. The interchange with I-94 sucks and needs to be reconstructed though.
So, Jimmy, what is your favorite number? 394827!
394827 by freygeothewhy January 15, 2021
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

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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