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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
Related Words
From the boondocks™ "nyuguh" (nee-uhh-kuh) is a term for a hardcore southerner to call a black person as a form of "nigga".
Aye nyuguh, get yo black ass over here!
Nyuguh by stephanie lover February 6, 2010

Nyuujiirando 

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

buru nyuu 

a phrase some retarded cat says, no one knows its meaning, probably a slur
buru nyuu by mokkaderg May 5, 2022
(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
Not a fag but a sexy beast with a big pp
Numu is the biggest pp man
Numu by Ace69420 June 7, 2022