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
Debbie from Crawfordsville, Florida, says that when she and her husband reach an impasse while working on something, they’ll say Let’s grok about it, which they use to mean “Let’s think about it.” Grok was coined by...
National Book Award winner Barry Lopez had wise advice for young writers. First, read widely and follow your curiosity. Second, travel or learn a foreign language. And third, find out what you truly believe, because if you’re not writing from...
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.