1 definition by Sieonigh

Nyah! Pronuceation: Nee-aah
1:it is a ramdome outbust usally to brake silence. 2:studies have shown that it could be the mating call of the Sieonigh.
Bob: ...
Dan: ...
Jon: ...
Another Guy: Nyah!
Bob: lol
Dan: shut up!

Sieonigh: Nyah!
unfortuantly no one ever answers.
by Sieonigh October 10, 2007
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