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Koro Sensei 

speedy ass hentai protaganist
I want Sebastian to Koro Sensei my ass
Koro Sensei by FloBros123 January 31, 2021

koro-sensei 

a yellow octopus teacher who destroyed the moon bc hes silly
Person 1: Omg what happened to the moon?
Person 2: lol that was koro-sensei. hes so silly
koro-sensei by Osamu Dazai Kinnie February 13, 2022

koro sensei simp 

degenarates who spend their lives jacking off to an anime octupus because they are discord mods and cant get bitches on their dick
ew a koro sensei simp, lets runso we dont see them make thirsty tweets
koro sensei simp by InfinityYT March 8, 2022

KoroSensei

A name given to a yellow octopus with a big smile teaching students to assassinate.
Good morning korosensei.
KoroSensei by Dr. Inkotopus May 14, 2018

korosensei

tentacle porn actor who works as a teacher and tries to destroy the earth even though he put a huge asshole into the moon already
you're a korosensei if you work for donald trump
korosensei by lmaolmaokkk June 17, 2016

korosensei

ih dude look! its the pornstar korosensei
korosensei by lurker-kun September 19, 2017
More from Urban Dictionary
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

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
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