This article is from the Atheism FAQ, by mathew firstname.lastname@example.org with numerous contributions by others.
They don't believe in God. That's all there is to it.
Atheists may listen to heavy metal -- backwards, even -- or they may
prefer a Verdi Requiem, even if they know the words. They may wear
Hawaiian shirts, they may dress all in black, they may even wear
orange robes. (Many Buddhists lack a belief in any sort of God.) Some
atheists even carry a copy of the Bible around -- for arguing against,
Whoever you are, the chances are you have met several atheists without
realizing it. Atheists are usually unexceptional in behaviour and