This is a bit off-ropic, but I'll answer anyway. Out of curiosity, why would you associate it with atheism? Since many (most?) Christian denominations believe

This is a bit off-ropic, but I'll answer anyway. Out of curiosity, why would you associate it with atheism? Since many (most?) Christian denominations believe it's forbidden to curse in God's name, it's actually more likely to have theistic origins. I don't think it's a signal either way as to belief or nonbelief, though. It's more likely to just be a part of their vernacular. Finally, as an atheist I can tell you that I have no need to avoid using the word "god". What's it going to do, cause a god to pop into existence if I say the name thrice? :) That would certainly be interesting.