Few people will admit it but the meaning of the word God is "what I don't know". Look for any phrase in which the word is used and see if that meaning works. For me it works all the time.

"what I don't know" created the universe
"what I don't know" lies behind science
"what I don't know" is everywhere
and of course...
I'm sure that "what I don't know" exists

An atheist is a person who believes that what they don't know doesn't exist. What both theists and atheists fail to realize is that they don't know what they are talking about. The only rational people on this planet are agnostics, those who believe that they don't know what they don't know. Makes a lot of sense to me.