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When your niece becomes your sister after your parents adopt her.
My sister has real issues, and my parents have to adopt her daughter. Now I have a nieceter.
nieceter by Uncle Bro June 19, 2010
Related Words
NicheTok refers to a TikTok aesthetic and culture that consists of stylized meme compilations and shitposts that reference multiple fandoms, subcultures and memes specific to TikTok, in that, in order to fully understand or appreciate the videos, one would need a niche literacy of TikTok trends and its algorithm. NicheTok is a twin trend of TikTok's Corecore and inspired various -core suffix trends on the app such as Hopecore, Pinkcore, Jizzcore and Distcore, among others. So-called NicheTokers use sped-up remixes and nightcore music as their TikTok sounds as well as sad slideshow audios that romanticize depression and loneliness. NicheTok videos first surfaced on the app in 2022 and ultimately hark on the aesthetic foundations that YouTube Poop built in the early internet.
This is the best #nichetok #hopecore video I've ever seen !
nichetok by ybthk March 27, 2023
anything you want it to be !
omg wotta nieche

that girl is such a nieche

stop being such a fuckn nieche

go nieche yourself

shove it up your nieche
nieche by Doonycaketiyani October 20, 2008

Nichetka 

Nichetka is the name of Piotr's russian mother. She is thicc beyond explanation. She is my cyka
Yo Nichetka! You lookin' mega thicc!
Nichetka by JimothyNeutron November 12, 2019
Someone who is witty, pretty and everything nice, and doesn't let your brain cells die while talking. But, doesn't watch shows recommended by others.
I prefer chocolate and so does Nichet.
nichet by CaptainAntarctica November 23, 2021
Nieche

Nieche is derived from Niel and Cheree and has a special meaning. This name means Darling, champion child of God. This little lady is gorgeous, loving and has a fine sense of beauty all around her. Her artistic nature and powerful sense of being makes everyone around her proud. Her tenacity and stubborn streak helps her find her way amongst fools. She never settles for second best.
Darling Nieche is at it again.

Her artwork is a real Nieche.
Nieche by goue muskaat February 5, 2010
More from Urban Dictionary

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
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
After we broke up, he was floxi to me.
floxi by Dr. Geek May 13, 2009
Word of the Day on September 28, 2026
NYC people who migrate north to Quahog, RI to see the leaves in the fall.
New York and everyone from there can fornicate themselves with an iron stick.
leafers by ss++ February 8, 2005
Word of the Day on September 27, 2026
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