Top Definition
A bad idea, or a no-no; expressing disapproval.
Pronounced neesh-neesh
Jeff says, "Hey guys, lets go down to the salvage yard and sell the metal to make a buck!"

Everyone else, in unison: "niche-niche"
by SeffreyJimon October 08, 2007
A business idea that is small and well thought out.
That niche-niche is the bee's knees!
by differentpeople February 29, 2012

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