Nico-Nico-Niice 

(adj.)

A term referring to that one person in your group who is a self-proclaimed friendly person.

1. pleasant; agreeable; satisfactory; all in a really contradictory way.

"I'm a very friendly person you may not think so but I normally am Nico-Nico-Niice"

Nico-Nico-Niice by AngelShinken January 3, 2019

Nico Nico Chorus

A number of singers on the Japanese Nico Nico Douga site whose individual versions of the same song have been edited together in such a way that it appears that they are performing the song as one united chorus.

The song is usually (but not always) a vocaloid or anime song with a video backdrop, often with captions and/or icons identifying the individual singers.

Search for "Nico Nico Chorus" on Youtube for examples.

Nico Nico Chorus by greymousie January 18, 2011

Nico nico nii 

Serious definition: Nico Yazawa's catchphrase from the anime show Love Live! School Idol Project. Though this character seems mean and annoying at first glance, she uses this phrase often to cheer people up and show them that they don't need to feel sad, as they should always smile no matter the situation.

Nico nico nii~~ I'll nico nii your heart! I'm Yazawa Nico-Nico, and I'll put a smile in your heart! Remember, I'm Nico-Ni, and I love-Nico you!

Nico nico nii by ZAPBoy October 21, 2019

Nico nico kneecaps 

A very big threat, if someone threatens your nico nico kneecaps you best be runnin. Holds power over the reverse card. Unless you have Danny Devito on you, you're screwed.

This man breaks nico nico kneecaps, aight ima head out.

Nico nico kneecaps by Loaf that's not buttered yet November 25, 2019

Nico nico nii 

The phrase mentioned by Nico Yazawa, a member of the idol group μ's (pronounced "muse") in the anime, "Love Live! School Idol Project". It can either sound really cute or really annoying to you. No in-betweens.

Nico: "Nico nico nii!!"

Umi: "stfu bruh"

Nico nico nii by Syahrul Danial August 30, 2020

Nico Nico Nii 

Every weeb phrase when meeting another weeb
Or

Cancer to everyone except weeb.

Nico Nico nii oni-chan

Nico Nico Nii by Shajanrai March 31, 2017

Nico Nico Douga 

Japanese video website overwhelmed by otaku in which comments scroll over the video at the place in the video where they were typed. For instance, if a comment is typed while the watcher is at 2:00, then all users from there on will see the comment fly by at 2:00, everytime. Sucks because you have to sign up to watch videos, and is impossible to navigate if you're an English speaker like everyone else. Available in every language but English, such as Supaanishu (Spanish), Garman (German), and amazingly understandable Taiwanese. This site is only good for MADs (which are AMVs, but actually decent), and Vocaloid.

"I was watching some Haruhi MADs on Nico Nico Douga."

"What the hell is Haruhi, MADs, and Nico?!"

Nico Nico Douga by Aerii December 30, 2008