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1.
The name of the head tribe in the land of Nu. They roam the Grasslands in the center of the land and lead all the other tribes and run the high council. They are known for there ferocious warriors who fight with pride and honor. They use war chants to scare their enemies away before they have even started fighting. These chants are known as 'the screams of the ancestors". The Nanu's leader- The King of Nanu was the creator of the charter in 507BCE. The Nanu's allies include the Ralulu's the sea tribe, the Ululu's the mountian tribe, the Shabado's the rainforest tribe and the Naru tribe from the desert. Their enemies include bandits and the fakers who call themselves "the new Nanu King". The language of the Nanu's is known around the globe for being the hardest toungue to learn. It involves breathing in while using the deepest parts of the vocal cords.
e.g. "That guy could be in the Nanu so don't mess with him."

"I heard the Nanu's penises are 15inches long"
by a lover of nanu May 13, 2013
 
2.
means "baby"
if yelled out in public by oneself, the other will most likely run in shame
also means "best of friends that are THE SHIT"
nanu, you are my bestestest friend:)
by imjustpeachy January 21, 2011
 
3.
maternal grandmom in bengali
by 25541 June 27, 2010
 
4.
(NAW-nu)
Originated from Mork and Mindy.

Either meaning blah, or shut up, or a very angry way of saying shut the f*** up! Or can be used as an Asian sex term.
Oh my pretty little nanu's! Holy nanu! What the nanu's!
by captin nanu July 24, 2011
 
5.
A common misspelling of the word "baby" this should not be laughed at as many do it.
Scott: I love you nanu.
Danni: L O L nanu wtf?
Scott: Baby* chill -.-
by scott_91 January 12, 2009
 
6.
(nah-noo)
A phraze used to say goodby and\or give recongnition for an idea. Commonly used by Captain Purplebeard Jimbo the Pirate
Person the first: "see you man"
Person the second: "Nanu"

or

Other person the first: "or we could do THIS!!!"
Other person the second: "Nanu, Nanu"
by Purplebeard Jimbo the Pirate April 18, 2009