Pocomaniac
/ˌpəʊkə(ʊ)ˈmeɪnɪak/noun
An adherent of a Jamaican religious cult which combines aspects of both African and Christian belief.
Origin
1920s; earliest use found in The Daily Gleaner. Origin uncertain; probably from Pocomania (although this is first attested slightly later) + -ac, after -maniac.