Generally refer to one who attends a charismatic church service. In which places a great amount of importance on the Holy Spirit.
This person tends to be a very devout Christian and during church service, maybe become influenced heavily by the Holy Spirit. Therefore consequently dropping on the floor and rolling "in the Spirit"
Hence where the term was coined, Holy Roller. Also generally is a derogatory term.

A person that is heavily relgious, listens to contemporary christian music, and has a "holier then thou" attitude.

n. A devout Christian who oppresses others' beliefs under the condition that those beliefs are inconsistant with the oppressor's. See also psychotic neofacist bitch.

A joint rolled out of paper torn from the Christian bible

Holy Roller was a derogatory expression for the classical Pentecostals who believed in dancing for joy with the Holy Spirit. The people who made up the expression were just rumor mongers who actually believed that Pentecostals actually rolled in the floor until they got holy. Some people misspell "Pentecostal" as Pentacostal.

Like High roller this person is a rich, affluent Evangelist who makes his/her money though ridiculous Christian TV shows

a religious person, usually white and from orange county. listens to christian rock on the TBN