mibster
n.— «It was only the second time John Leffakis attended the national competition since becoming a mibster, another name for marbles players.» —“Allegheny mibsters seal Wildwood victory with a kiss” by Trudi Gilfillian pressofAtlanticCity.com (New Jersey) June 20, 2008. (source: Double-Tongued Dictionary)
Further reading
Need a slang term that can replace just about any noun? Try chumpie. If you’re from Philadelphia, you may already know this handy placeholder word. And there’s Queens, Brooklyn, Staten Island, Manhattan, and … The Bronx — why do we add...
Sean in Oneonta, New York, says that when he was growing up in New Jersey, his family would pile in the car and set off on a surprise adventure, whether a short distance or long, and the kids would be told only that they were going on Buxtehude...