Top Definition
The sound emitted by the world-famous, action star Arnold Schwarzenegger either in times of stress, or great pain and anguish.
"Go, get to duh choppa--Nyaaa!"
by Thomas Morris April 29, 2003
1 more definition
A phrase that was oft employed by those famous lead singers of the "hair metal" genre of bands from the 1980s.
"ROCK you like a hurricane! NYAAAAAHHHHH!"
by Markus Brodigan October 26, 2003

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