1. extremely disgusting,
2. a shortened version of sick and nasty
1. That sandwich is sick nast. Its been in your fridge for 5 months!
2. Jared told a porn joke, sick nast!! He's such a perv!
by mibackibenzibie February 08, 2008

7 Words Related to sick nast

over-the-top disgusting,
Did you see that sicknast girl just walk by?
by Critty Gee August 30, 2010
an adjective to describe something awesome
Geoff O'Callaghan is the sick nast
by Geoff February 22, 2004

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