look up any word, like ratchet:
 
1.
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
 
2.
A business idea that is small and well thought out.
That niche-niche is the bee's knees!
by differentpeople February 29, 2012