I see no need for a new name, myself. Atheism is a very specific term, applying to a non belief in a deity only. Why on earth would you wish to define yourself by such a narrow filter? For me, Atheism is only a part of who I am, and I am content that, when talking about gods and religion, I am known as an atheist.
Describing yourself should encompass more than just your attitude to gods and religion, and you will not be able to find any single term to cover all of what you believe.
In the spirit of the question though, I would have no objection to being described as a heretic, or infidel - both sound vaguely menacing :)