Something which is not real or exists only in someones imagination.
Examples:
santa claus
the tooth fairy Easter bunny
god
heaven
hell
The bible and other storybooks.
Everyone knows god is fiction but many are too big-headed to admit they are wrong.
Fictious character who some people believe is a magic man who can make magic and they usually waste half their life praying to it. Many of these people have been brainwashed by the bible.
"God is sitting on his cloud watching us all & playing his harp", says brainwashedBarry.