Top Definition
A sexual slang for a threesome used in Britney Spears' hit '3' about threesomes.
Peter, Paul and Mary are actually a folk group.
John: "I'm thinking a lot about Peter, Paul and Mary"
Ashley: "Why? Who do you want to do it with?"
John: "Oh, no. I meant the folk group."
by Naastna August 17, 2014

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