What is Molly Mormon?
1.
A female member of the Church of Jesus Christ of Latter-day Saints (Mormon) who fits the stereo type of the goody-goody Mormon. She's very devoted to the Church standards. Can be used both negatively and positively. See also "Peter Priesthood."
Sarah is a total Molly Mormon. She never misses Sacrament Meeting on Sunday!
2.
A member of the Church of Jesus Christ of Latter Day Saints that actively follows and participates in their religion. This phrase traces its origin back to Las Vegas. Opposite of
1: Is Katie coming to the party this weekend?
2: no dude, she's a molly mormon.