What exactly is coexist? i mean the religion?

Um, okay. Your friend is making a joke based on a popular bumper sticker.

http://www.stampandshout.com/shop/bumper-stickers/coexist.php
 
I've never heard the word used as a noun. Maybe she meant that she coexists with other religions, ethnicities, nationalities, etc. There is no religion called "coexist".
 
Perhaps she's telling you to shut the hell up about your own religion, so the two of you can peacefully coexist...

But seriously -- are you sure you're spelling it right?
 
Back
Top