Niiji 

Niiji is an ancient descriptive term that defines all indigenous or aboriginal people that have historically inhabited the landmass called Turtle Island, in which this "Turtle Island" term refers only to particular western areas of the supercontinent known as Gondwana; which includes North America, South America, Canada and the surrounding Pacific Islands.

Not to be confused with the word "friend" which was originally defined as "a Quaker" or "a member of the Religious Society of Friends" during the mid-1600's and beyond, the term Niiji was directly used as a positive means to refer to an ally or an associate by numerous indigenous families throughout America and Canada, especially amongst men who traditionally used Niiji towards each other as a sign of respect for one another.

The Niiji are the indigenous people of Turtle Island.

Niiji by Aboriginal Turtle April 8, 2022

Nijisanji 

A group of VTubers under the company Ichikara Inc. Quite popular among the VTuber community. Also referred to as "2434" due to the fact that the numbers read aloud in Japanese sound like "Nijisanji". Fans will sometimes donate 2434 JPY.

"Recently I've been watching more Nijisanji, dude."
"Oh, yeah! Recently, I've been checking them out too."

Nijisanji by one hell of a deer November 28, 2020

Okuyasu Nijimura 

Oi Josuke! I used「ZA HANDO」to delete this Urban Dictionary definition! Ain't that crazy?

Person 1: What stand user has「ZA HANDO?」
Person 2: Okuyasu Nijimura, you dumbass.

Okuyasu Nijimura by Hydrata October 24, 2019

Nice/niice/niiice 

Nice, being the origional and "correct" version of the word, is most commonly used, however, the two other spellings are perfectly acceptable, though there are differences. Niice, more intense than nice, and yet not so intense as niiice, is often used when something is funny or cool, though not as cool as something that is awesome. Niiice, being the most intense, is only to be used when something exceeds the awesomeness of nice AND niice.

That's nice/niice/niiice!

Nice/niice/niiice by rianette June 10, 2009

Nijika 

The paragon of human virtue.

Nijika is the paragon of human virtue.

Nijika by Odd At Sea June 5, 2023

Ninjin 

The Coolest Carrot the world is ever seen

penis

The Coolest Carrot the world is ever seen

Kid "OMG NINJIN U A CARROT"
Ninjin "ye"

Kid 2 "I feel like eating a Ninjin"
Ninjin "OMG PLZ NO EAT ME"

Ninjin by JayIsKool69 October 4, 2016

Naijiahuang 

B-boys of Asian descent.

Break dancing, in the 80s and early 90s, was predominantly the domain of African-Americans. Participants were/are referred to as b-boys.

The New York colloquialism came into popular use in the late 1990s with the increased popularity of break dancing among Asian-American youth. It has since spread throughout Northeast colleges and universities.

Walking through Union Square park, we saw a few Naijiahuangs performing head spins.

I went to the dance competition on Slope Day and a Naijiahuang stole the show.

Naijiahuang by GAS Captain April 13, 2009