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Invented by the one and only original goon circa 2012. Ninini refers to the feeling of ultimate happiness and gooniness. The peak of peaks when it comes to feeling amazing.
"Hey, it's almost December."

"Ninini can't wait!"
by goonster September 30, 2014
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2
the sound that a cute boy makes before an attack. many cute boys will scream NININI before they charge a group of unfortunate people whom will probably be frightened and probably pummeled by blunt objects.
Group of drug addicts"those cute boys think they are sooooo cool."
Cute boys "NINININI"
Drug addicts "AHHH SHIITTTT!" as they cower in a corner.
by sick flick October 26, 2011
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