I can't conjure up any concept of anything labeled "God" (or "Allah"). But most atheists say "I don't believe in God". What are they saying they don't believe in? I certainly don't know. I also don't know of any god that Christians, Jews and Muslims believe in.
I look up "atheist" in the...
Christians, Jews, and Muslims believe that "God", "Yahweh" or "Allah" refers to something that exists.
Atheists believe that "God", "Yahweh" or "Allah" refers to something that does not exist.
Ignostics, theological noncognitivists, and igtheists do not believe that "God", "Yahweh" or "Allah"...