A Nunskin (both noun and verb, the only word that is a noun and verb)(Pronounced Nun-skin)) is another word for a person who, through false interpretation, misleads another human being (or cat (cats suck)) to think that you are worse than you actually are (being a complete fuck-wit (pronounced fuck-wit)).
You show a picture of you (your a male) with two chicks. And then, you send it to someone and say that your rooting the uglier one, after they initially comment on how hot the other chick (your partner) is. That is a true Nunskin.
by Opquij July 26, 2009