Top Definition
A freakish alien who only appears at night. ;) just kidding! gorgeous, quiet, long legged girls. often appears shy. super nice, usually, however Nyessa's have a mean streak that youd prefer not to find out about. nyessa's usually have dark hair, and arent easy tanners (resembling snow white). Nyessas are smart, funny, and slightly awkward but super loving. Nyessas have a love for arianas.
Dang, she looks like snowwhite...must be a Nyessa.
Is that a Nyessa who goes to Newtech?
That girls always with Ariana, must be a Nyessa. ♥
by Voldefreakinmort October 16, 2013

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