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One who has done something so abominable that s/he can never be trusted or respected again.
person a: He lost the bet, but refuses to drink toilet water.
person b: OMG, I can't take his shenanigans anymore, he's officially a permacusty!
by Alex Ostrovsky August 16, 2008

Words related to permacusty

backstabber custy loser shenanigans unforgivable