Definition from Wiktionary, the free dictionary
From the fact that devout Pentecostals would roll on the floor of the church as a sign of being possessed by the Holy Spirit.
- (informal, usually derogatory) A member of any Christian church characterized by ecstatic behaviour; especially of the Pentecostal Church.
- I attended a worship service where I was astounded to see holy rollers convulsing on the floor and speaking in tongues.
- (informal, pejorative) A devoutly religious Christian person.
- She's such a holy roller that she steers every conversation around to the joys of religion.
member of any Christian church characterized by ecstatic behaviour