Additional name for atheists?

Haven't posted here often, but hey, since this group exists (unlike that other entity), why not get some feedback on the non-believer name I go by: cosmost.

Cosmost combines 'cosmos' with 'most', in the dual sense that the cosmos is all that exists & also is 'the most', a complimentary term common among '50s teens, hipsters, Beats, & jazz devotees. Admittedly, the latter definition is meant as a joke (which is what I consider theism to be), but I think the main idea is apparent.

Cosmostism can be equated with Naturalism & its offshoots, but I'm not aware of any atheistic label that refers specifically to the universe. If there are any, please post.

Anyway, just a thought for The Day HE Came Back. (Sam Raimi, are you listening?)