Top definition
A combination of FRESH and NASTY.
Really gross, nasty, or ripe.
Eww! That banana is so old and frasty!

Oh my god! This skank is so frasty!
by Laurie333 June 10, 2010
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2
When someone is just ugh.
He wouldn't share the math homework, he was being a frasty douche.
by MalachaiMonday May 26, 2016
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