Definition from Wiktionary, the free dictionary
plyg (plural plygs)
- (slang, offensive) A fundamentalist Mormon.
- Members of the fundamentalist plyg movement are "Mormon" but are not LDS.
- The schoolgirl drew stares from outsiders because of her long pastel dress and upswept hairdo, and her brother once got into a fistfight with a group of Gentile and LDS boys who had been taunting him and his sister, calling them "plygs".