foamer
n.— «A self-proclaimed “subway foamer,” or buff, Mr. Jabbour has a passion for transit-related subjects like infrastructure, routes and track design.» —“Can He Get There From Here?” by Rachel Corbett New York Times Apr. 22, 2007. (source: Double-Tongued Dictionary)
Further reading
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...
Asthenosphere, a geologist’s term for the molten layer beneath the earth’s crust, sparks a journey that stretches all the way from ancient Greece to the author of Uncle Tom’s Cabin. Plus: What the heck is a dogberg? It’s when...