A
cyren is any girl who appears very attractive on her online social networking page (e.g. Facebook, Myspace, etc.), but in reality is mediocre, at best. The word is a hybrid form of the words "
cyber" and "
siren."
My friend Brandon thought he had discovered an online babe. Turns out, she was a total
cyren.
Friend 1: Dude, this babe just added me on facebook. I think she wants a piece.
Friend 2: Oh no, stay away from that chick. She's friends with
my ex, and is the omega-cyren!
TRUST ME.