Naw. There isnt such a thing. We sometimes say "thats like chinese" idiom to say we dont know what he heck youre talking about. Dont ask where we got that from. A lot of religious and racial slurs in the States.
When we use it, it isn't a slur. We use it just to denote that the application and understanding is only for Christians.
Like, "I'm born again"! Tell that to someone in the jungles of Africa and they wouldn't have a clue about what you are talking about
All in good fun.