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(adj.) a ghetto combination of the words "sick" and "nasty" used to describe a person or persons as both sick and nasty. (may also be used to describe animals)

plural form: sicnasteez
verb form: sicnasting-the act of being sicnastee
Jessica: Omg, look at Brittany's outfit!
Madison: She is sooo sicnastee.

Madison: Are Landon and Farrah back together?
Jessica: Yeah, they're a real sicnastee couple.
by LadyScarz January 27, 2011
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