Nyaaa!

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

Nyaaa!

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