Top definition
noun, verb, NYAHHHH’ing, NYAHHHH’ed

noun-

1.A sound made by Lord Voldemort in extreme anger.
2.A noise of great discomfort or anger: Lord Voldemort likes to Nyahhhh
verb-

1.To nyahh: His noseless face nyahhhh’ed all through the trailer.
by Kristina Lilienthal June 16, 2011
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