Top Definition
Adjective. Basically short for nasty, but used when repulsed beyond the state of nasty.
That is nast!
Nast...
by Scott April 03, 2003

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The new and improved way to describe something repulsive. Is commonly used by teenage girls to convey their feelings about guys, any form of fried food, and their grandparents. Proceed with caution as this word when overused can be fucking annoying.
I'm never hooking up with Josh again. He's nast!

This salad is nast.
by fliesandspiders November 13, 2014

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a word used to describe anything. usually used during a intense conversation between a group, or more than one individual.
1. "oh my god you little nast." 2. "did you see that one little nast over there?" 3. "nastbucket" 4. "nast nast nast"
by dharshini, sandra, matt. April 12, 2007

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Adj., Shortened version of nasty.
Ew, Lucas is so nast.
by Bæ or nah January 12, 2015

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The noun form of nasty, generally used to designate something unidentifiable that is nasty.
That festering bucket over there is full of nast.
by Panderblaka13 October 08, 2012

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An object, smell, or sensation that can be described as nasty.
"I'm not picking that thing up, it has nast all over it!"
by jestermeister August 22, 2003

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Noun form of the word "nasty". A word used to describe any unidentified substance or aggregate of matter, which doesn't necessarily have to be particularly nasty.
Patron: "Waiter, can we have some more of that tasty green nast?"
Waiter: "Do you mean the Tomatillo Salsa?"
Patron: "That's the stuff!"
by Jeo March 15, 2006

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