…(jumping up and down… excitedly waving both hands above head)… Oo-oo-oo! Me-me-me! I know this one! I know it!.. You are a patient in a maximum security psyche ward! YES! Nailed it!.. 
… Okay, what kind of prize did I win? I was told there would be a check.
That person is called A Theist. See? You simply forgot to add the space between the A and T… 
… OR, now that I think about it, that person could possibly be a stoned out groupie chasing after a popular rock band. In which case, that could still potentially make that person A Theist, depending on the characteristics they attribute to the band’s “members”. (Feel free to read into that whatever you wish, you dirty-minded heathens.)
(Edit to obtain backstage passes.)