Top definition
When something or someone is very ugly or undesirable. Combination of nappy + ass+nasty = nepasstay
My last blind date was nepasstay and smelled of stale beer.
by Spineless March 01, 2017
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Apr 28 Word of the Day
Literally everyone, ever. Including the writer of this definition.
by masokitsune January 17, 2019
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