Although this phrase sounds derogatory, it is in fact a very, very positive thing. It is used the same way as "cool," or "awesome" in modern language.
Guy: "That nollie mctwist backflip was sick nasty disgusting!"
by Ugly Dude Guy May 24, 2008
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When something is so fucking awesome that it is at the same time dope sick AND nasty.
"Dude did you see that crazy trick i just did?"
"Yeah man, that was dope sick nasty!"
by Jovomo March 6, 2010
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the most illest happening on planet earth ever.
Oh shit son, that was ill sick nasty!

That new Apollo Sunshine CD is pretty ill sick nasty.

Could be used when the world is about to berak into peaces from a metor and superman, batman, and all the coolest super heroes distroy it together
by poophead2q3523432 February 12, 2006
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The greatest thing since bagged potato chips. On point. Can be used to describe a person, place, or thing.
1: "Dude, I love your new car! Thats so sick nasty awesome!"
2: "Have you ever been to Salt Lake City? Its so sick nasty awesome!"
3: the definition of oral sex... Sick Nasty Awesome!
dope
chill
cool
bad ass
by xCURBCHECKx February 2, 2010
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Contrary to its wording. Sick-Nasty is a good thing. It means that something is so cool that it is sick but at the same time nasty because you want some of it.
Kevins girlfriend is sick because she acts just like a guy, but then nasty because we want to f*#$k her, therefore making her Sick-Nasty.
by Pulchunk September 5, 2006
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Origins: Boston
the ultimate adjective for New Englanders
means extremely awesome
note: anyone outside of new england that says any of these other than sick will sound like an idiot. So i suggest not doing that.
by Leslo :3 March 19, 2011
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Instead of just the word "awesome", this word is used instead when more emphasis is needed, hence the sick and nasty.
"Yo man, that stuff's totally sick nasty awesome! Bangin!"
by Bangin Lil Bro January 28, 2008
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