Nii 

(N.)A derivitive from the Japanese language. It is translated to be "Brother." or "Older-brother."

Nii, give me back my toy!
Nii, your the bestest brother a kid could have.

Nii by BlackBlood Sky July 21, 2011

nii 

The sound that the Knights of Nii make in Monty Python and the Holy Grail

We are the Knights of Nii! Nii nii nii nii

nii by thereallucifernot November 13, 2010

nii 

The black version of the Nintendo Wii console.

Bob: I got the glossy black Wii console!

Tom: No dude, you got the Nii!

nii by Jeph Jacques December 7, 2006

Nii 

A person that sucks at Fortnite

You are such a Nii at Fortnite

Nii by TheCacaca December 7, 2018

nii 

Meaning: No!....in an explitive manor!!

Broke Stoner: Dude go to the store and buy some beer for us, but we dont have an money.
Rich Stoner: Nii!!!!!

nii by Ant C August 26, 2003

Nii 

A stupid ass haitian name

"Stupid mom on drug while she in labor name nii"

Nii by Christianpd March 26, 2013

Nii 

An offensive slur for the popular Nintendo characters known as 'Miis'.

yo that bitch is a nii

Nii by mrcreepypeach March 13, 2022