Top Definition
A person who faithfully believes there is no chance any deity could exist.

A person who is steadfast in the belief that no God exists and does not require proof or evidence to support this belief.
He's not Atheist dude, he's Deitic Nihilist and wouldn't believe in God even if the Archangel Michael came down to say hi.

That Deitic Nihilist is just as stubborn as a Christian Fundamentalist.
by J. Mann February 21, 2014

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