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A female who is extremely attractive, but also very religious. Wears a purity ring , but claims she's sexually frustrated . Lures men into a relationship only to convert them into fellow Bible Thumpers . Will always talk to you about religion in hopes of making you more religious/convert to Christianity. She will do things like make out and maybe an OTPHJ .
Stan: "Bro did you see that new chick Janet, she's fucking hot as shit, I'm gonna try to get at that !"

Lee: "Nah dude, bad idea"

Stan: "Why? She's a total 10"
Lee: " Dude, that chick is a Christian Siren"
Stan: "Oh, Fuck That"
by Dr.Vadgers September 20, 2015
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