Apatheism (a highly original portmanteau of "apathy" and "theism") is the belief that the very question of whether or not deities exist is not relevant or meaningful in life. Apatheists are not even interested in addressing any claims for or against god(s). Almost literally "I don't care about gods."
Author and journalist Jonathan Rauch quite effectively described apatheism as:
|[A] disinclination to care all that much about one's own religion and even a stronger disinclination to care about other people's.|