A member of a church service audience whose enthusiasm is anything but graceful or gracious. Their behavior is considered out-of-bounds and over-the-top; behavior similar to a person having a manic episode.
From the book, The Color of Water, James McBride describes one particular person in the pews of a church service, "They were mostly women, big mamas whom I knew and loved, but when the good Lord climbed into their bones and lifted them up toward Sweet Liberty, kind, gentle women (holly rollers) who mussed my hair and kissed me on the cheek and gave me dimes would burst out of their seats like Pitssburgh Steeler linebackers. "Oh yessss!" they'd cry."

For those who know a little about basketball, it's embarrassing when a defender falls for a fake. They jump needlessly, and give a wide open lane or shot to the opposing offense.

"Bubba, was that your mom last Sunday in the aisle?"
"Yeah, she can be some what of a holy roller."
by Nick Psiaki September 1, 2006
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A holy roller is someone someone super cool who is really into spirituality and making the world a better place.
The holy rollers got enraptured in a prayer and then went on to save the dolphins.
by RaysofLife747 May 20, 2021
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1. A gathering of fundamentalist, bible-beating, right wing Christian Evangelicals

2. A vast or over-the-top display of flagrant, in-your-face evangelical Christian messages or scripture
As the two athiests approached the large group of Evangelicals who had gathered on the lawn to protest gay marriage, Bill said to Gary "Look out ... holy roller derby ahead."
by seumasbeg January 8, 2013
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When you tear out a page of the Bible and roll it up to use as a joint.
"Yeah, Jack and I had a holy roller after Claire's wedding."
by My-Lady-Greensleeves July 4, 2022
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