LaVeyan Satanism is a form of atheism which extolls the values of Satan which are described in the Bible. It is a very prideful and hedonistic worldview. Some specific characteristics of Leveyan Satanism is that it incorporates egoism, self-deification, the occult/magic, Social Darwinism and naturalism. It was found by Anton LeVey in 1966. The Church of Satan was also founded by LeVey.
See also: Atheism quotes
"Look at Satan's reason for rebelling against God. It's not that he doesn't recognize that God is greater than he is. He does. It's just that he doesn't want to play by anybody else's rules. This idea that it is better to reign in hell than to serve in heaven is Satan's motto, and it turns out that this is also the motto of contemporary atheists such as Christopher Hitchens." - Dinesh D'Souza 
- The Satanic Temple (Nontheist organization)
- Church of Satan - Religionfacts.com