Nee-ner Nee-ner 

You say this when you have already gone back and forth to a specific location at least two times because you keep forgetting your stuff.

"Nee-ner Nee-ner"
"Why are you back home again?"
"Forgot my bookbag"
*misses bus*
"Fuck"

Nee-ner Nee-ner by zh80074 December 1, 2019

Neener-neener 

Childish taunt typically used to express that the taunter is getting away with a sleight against the tauntee in some manner.

Once Jeremy got in the car he rolled down the windows and showed Ron the candy bar he filched from his backpack and shouted 'neener-neener' while rolling away.

Neener-neener by Doctor Wombo November 19, 2015

Neener-neener 

A childish taunt or jeer pronounced with a nasal sneer, for lack of a more intelligent retort to someone else's jeer or taunt, usually from a peer. Sometimes sung to the tune of "Ring-Around-the-Rosy" for really driving the point home.

My definition is better than all the other stupid definitions listed here - neener neener.

Neener-neener by Lenny Schafer October 2, 2003

Neener-neener 

Word of jest or teasing. Similar to saying "ha-ha" or sticking a tongue out at someone.

How was the cafeteria food? I had homecooked turkey and potatoes! Neener-neener!

Neener-neener by Schaum February 11, 2003

Neener neener

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)

Neener neener by Amaya__Sakaruta July 5, 2010

neener-neener 

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!"

neener-neener by Usukyuak Anaktuvut November 16, 2006

neener-neener-neener 

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!"

neener-neener-neener by the best me I can be February 12, 2010