Monday hammer
n.— «Monday hammer. A 32 pound sledge hammer; means worker must have day of rest before being able to wield heavy hammer.» —“[pencil] Motormen and Conductors” by Workers at 3rd Ave. and 65th St., carbarn in New York City Lexicon of Trade Jargon , 1938-39. (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...