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Kosnane is a term used to describe someone whose mother is a whore (jendeh). Unlike koskesh, which can be used as a term of endearment towards friends, kosnane is used solely as an insult.
Hassan: that kosnane hasn't given me the money he owes me yet!

Behnam: when I find you, I'm gonna kill you, you kosnane!
by Persianpride91 February 08, 2014
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