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.
A Costi is a derogatory slang term for a person, implying that they have an inflated sense of uniqueness, an unwarranted sense of entitlement, or are overly emotional, easily offended, and unable to deal with opposing opinions.
Captain Christopher- Columbus Costi is a Costi
Costi by Costi September 21, 2023
Related Words
A statement made in the mannerism of Costi. Often pertains to an obvious solution to or readily apparent aspect of a given situation.
While playing video games, someone falls off the edge of the map

Cosi: "What you've gotta do is not fall off the edge here."
Costi-ism by John Dimond February 22, 2005
A statement made in the mannerism of Costi. Often pertains to an obvious solution to or readily apparent aspect of a given situation.
someone: "I'm tired"
Costi: "Then go to sleep"
someone: "but I've got work to do"
Costi: "then do your work"
Costi-ism by John Dimond May 13, 2005

ethan costi 

Ethan costi is a sexy fucker that loves a special girl that begains with A and ends with R he will spend the rest of his life with her
Ethan Costiis a sort

good casting 

It’s a phrase used by Hero and Josephine which means that they’re secretly dating .
Why do you guys have such good chemistry

Hero and Jo :
gOoD cAsTiNg
good casting by Youdontknowneee April 17, 2019
Can be used to describe women with a slender frame and longer than average limbs, or due to their slim body appear to be so.
Stephanie Corneliussen and Maria Domark are attractive women with a coltish body type
coltish by munky82 January 10, 2019
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
Load more