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(knee-nuhr) interj. An interjection typically used to taunt, ridicule, or boast.
"No thanks to you, but I was able to score the last tickets to the show tonight, and you're not going with me, so neener!"
by cowinator October 09, 2003
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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 25, 2010
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A neener can be many things. Mostly used for reffering to someone or something smaller than you. It could also be used as an adjective to describe someone who just did something stupid.
To my little nephew who is 2. "Aw you so cute you little neener."
by Muzzypoo February 07, 2009
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Neener (noun) - A neener is a person who takes the fun out of things, usually just by being who they are.
They usually will cite some lame reason like "They shouldn't give that free stuff to the employees, it should be used by the IT department"

Another example (Seattle, 2007):
"At a Christmas tree lighting, Mayor Nickels warned the kids they had to use energy efficient light bulbs, or climate change could melt the North Pole --- and drown Santa, his elves and all his reindeer."
Sometimes extreme environmentalists are called "enviro-neeners"
by phnhme February 16, 2011
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noun. slang.

a slang or urban term used to describe a 9mm handgun.

originates from southeastern Virginia in the Norfolk, Hampton, and Virginia Beach region.
"Yo, flash that neener and peel a cap on them fools!"
by C_Smith April 24, 2006
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