Skip to main content
Urban Dictionary Merch
Your favorite words on things you can wear, drink from, read, or give to a friend.
The Urban Dictionary Store sells gifts you’ll have to explain.
Long ago, this site was site was born as an anime forum. It was a place for horny dweebs to post boobs and hentai.

But then, everything changed. Hackers, pedos, trolls, and political extremists of every flavor began to use this site as their HQ. They would attack, hack, and troll anyone who dared stood against their empire of nightmares and filth. It was truly the bane of the internet.

At the same time however, many memes, franchises, and movements were born here. The alt right, Wojacks, God knows how many 2010’s and 2000’s memes, SCP, Qanon, The Backrooms, Trollface, and modern weeb culture all have their roots here.

We all may hate it, but it undeniably helped In pioneering the birth of internet culture as we know it, It has affected real world events, and it has irreversibly shaped many people’s lives, directly or otherwise.

Nowadays, it’s come full circle. With horny dweebs posting boobs and hentai being it’s main demographic again. Although it has never truly returned to its late 2000’s to early 2010’s prime.
“I never thought I’d say this, but I kinda miss when 4chan was big.”
4chan by Mr. sssbapzc April 16, 2022
4chan is peachy hell. It's delicious at first, then the pit explodes in your face and you wake up missing a kidney.
4chan by Wuadada June 18, 2009
The asshole of the internet. Somewhere where nobody wants to be, but still are.
"Dude check out this pic i got from 4chan"
"AWWW SHIT DUDE WHAT THE FUCK"
4chan by luvvvvmudkipz August 18, 2008
Welcome to 4chan
1) Please leave your religion, morals, and opinions at the door.
2)Please note, women are not permitted to enter this site without showing their breasts.
3)Please be advised that adult content is beyond the opening page in a very childish manner.
4)Please be made aware that every sexual fetish ever conjured by the human imagination lies beyond the first page.
4chan is the sphincter of the internet. Also known as the interbutts
4chan by Anonyperson May 26, 2007
The sphincter of the internet.
Where integrity goes to die.
...look, another anonymous middle aged fucktwit on 4Chan posted some more pics of cartoon babies having sex...
yay.
4chan by FlowersInMidgar October 25, 2006
the complete shit hole of the internet. its user consists of almost nothing but perverts and douche bags who act like assholes because since its anonymous and its over the internet they can act tough to make up for their insecurity's in real life.
oh look another post on 4chan about a 27 year old guy fucking a 16 year old girl and oh look... every comment is telling him to do it and post pictures of them fucking after ward's for them to see... i don't even know why i come here.
4chan by former 4chan user January 22, 2011
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
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
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026
Load more