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
When an international team of scientists traveled to a research station in Antarctica for six months, the language they all shared was English. After six months together, their accents changed ever so slightly — a miniature version of how language...
Journalist Bianca Bosker infiltrated the world of contemporary art and wrote about it in her book Get the Picture: A Mind-Bending Journey Among the Inspired Artists and Obsessive Art Fiends Who Taught Me How to See (Bookshop|Amazon), often with...