rubber hammer
other.— «“Rubber Hammer”—Another imaginary tool a green horn is sometimes sent for.» —“Trade Jargon—Carpet Industry” by Ellis H. Custer in Westchester and Yonkers, N.Y. Lexicon of Trade Jargon Mar. 23, 1938. (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...