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1. The name of Lucy's less psychotic alter ego in the splendid anime Elfen Lied. After Lucy is shot in the head with an anti-tank rifle she develops a childlike personality, and for the most part of the anime can only say the word "Nyuu". This single-word vocabulary leads the male lead (Kouta) to give her the name Nyuu.

2. A nonsense word in Japanese, though phonetically it sounds the same as the Japanese word for "Milk".

(Note: the Japanese equivalent of 'meow' is 'nya'. Due to the similar spellings, 'nyuu' is frequently mistaken for being synonymous with 'nya'. The two are not interchangeable.)
1. With a fantastic body, childlike kindness, and an oddly raging lebido, Nyuu is almost cute enough to make you forget that she spends her down time ripping peoples' arms out of their sockets.

2. Nyuu. Nyuu, Nyuu. Nyuu? Nyuu!
Nyuu by Damn it Jim! August 18, 2010
(Pronunced NEWWW) Is a word said whether excited or upset. An emotional response to something. Made by changing the pich of the word. If happy or excited the word Nyuu is said with a high pich. If sad or annoyed its justed in a melancholy or low tone.
person 1 OMG long time no see
person 2 (aka me) NYUUUU!!!!(high pitched)

person 1 u okay?
person 2 (aka me) Nyuuu.....(low pitched)
Nyuu by Lisa Edmont November 13, 2007
Related Words
"Meow" in Japanese. Best used for getting the attention of a friend or loved one when hungry, tired, bored, horny or any of the above.
A: Nyuu!
B: Aww.. What's the matter princess?

A: Nyuu?
B:....
A: Nyuu!
B: What?!
Nyuu by roguedreams May 25, 2010
Nyuu: ep: an exclamatory phrase used to say "i'm innocent and adorable you shall love me or I will kill you!"

Japanese for "meow" used by Lucy in Elfen lied
Koda:"why did you do that?!?!"

Lucy: "Nyuu!"
Nyuu by lolofroll January 9, 2011
Nyuu... What the hell is this Nyuu... shit ? Nyuu...
Nyuu... Something is wrong with 4chan !!!! Nyuu...
nyuu by AnonymousDelivers December 14, 2008

buru nyuu 

a phrase some retarded cat says, no one knows its meaning, probably a slur
buru nyuu by mokkaderg May 5, 2022

Nyuujiirando 

Nyuujiirando is Japanese for New Zealand
Nyuujiirando by Terrynz June 23, 2008