A great way to annoy someone. Best if said while putting your thumb on your nose and waggling your fingers.
Person A: You're so immature.
Person B: Neener neener! (finger waggle)
by Amaya__Sakaruta June 30, 2010
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An extremely intelligent term used by very talented women as a blase retort to attorneys and other highly educated professionals who feel the need to prove they are the smartest person they know.
"Keep quoting Urban Dictionary, suckah. Neener-neener-neener!"
by the best me I can be February 12, 2010
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An expression of mockery, the American pronounciation of traditional English "Nyah-Nyah". Spoken with same camber and tone in both languages.
Compare American:

"I'm faster than you are, Neener-neener-neener!"

with English:

"I speak English and you don't, Nyah-Nyah-Nyah-Nyah-Nyah!"
by Usukyuak Anaktuvut November 16, 2006
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(n) nee-nurs
Genitals of either sex
The cock and balls form a system of neeners.
by inferior olive April 21, 2007
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Phrase meant in tease, usually said while tickling another.
Girl tickles a guy and says "neener-neener" as she does it.
by nate August 21, 2002
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The term neener- neener derives from the ancient school named Freeman in Babylon. It is typically used in the phrase Young neener neener meaning whats good to the homies. Only a select few will ever understand.
You see your friend john on the road at a stop light. You shout young neener neener, and john nodes and replies younggggg with the emphasis on the "G". Then they would bot go on their way knowing they knew "what was good".
by Neener Neener 1 February 25, 2020
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1.A kid who drinks Pediasure and wears a helmet.

2. What those kids say when they are confused.
"Graesen, you are such a neener, now go drink your pediasure"!!
"NEENER NEENER NEENER!!!"
"Go put on your helmet too, neener!!"
by GargoyleGabri December 26, 2011
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