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Clergyman from any number of different Christian sects who introduce young alterboys and choirboys to the mysterious inner working of the church by the secret ceremony of the lifting of the cassock.
Choirboy: The Reverend has asked me to stay behind and help him to find some coins that fell off the collection plate and rolled under the alter.

Alterboy: Don't do it, trust me dude, he's a total cassock lifter.
by Blue Cawdrey November 23, 2004