Christ Alone: "Yeah, I guess most agnostics say that you "can't" know, but there "may" be something out there."
In essence, you are right. Technically, an agnostic neither believes nor disbelieves the existence of God (and a few other things) because there is an inherent impediment that keeps us from conclusively determining that existence or non-existence. Consequently, some agnostics will leave the possibility open for the existence of a supreme being and other agnostics discount it all-together with the caveat that we can't prove it and know for sure.