muggle
n.— Note: Borrowed from J.K. Rowling’s books about Harry Potter. «He glanced around to make sure no muggles were watching. UF’s campus is crawling with muggles, the term for those oblivious to the worldwide scavenger hunt known as geocaching.» —“High-tech hunt” by Jessie Coleman in University of Florida-Gainesville Alligator Oct. 17, 2006. (source: Double-Tongued Dictionary)
Further reading
Enthusiastic book recommendations! Martha’s savoring the biography of Alexander von Humboldt, the 19th-century explorer, polymath, and naturalist who revolutionized our understanding of nature and predicted the effects of human activity on...
A caller who grew up in Wisconsin says his spouse, who’s from Florida, teases him for such things as pronouncing bagel like “BEG-el” and dagger as “DEG-ger.” They’re just products of his isolect, the regional variants from his particular dialect of...
Is being used by other affinity groups to refer to non-initiates. e.g., in fandom for non-fannish people. Very similar in usage to the longstanding use of “mundane” as a noun.