Monday hammer
n.— «If they couldn’t get it undone with that, we used a flogging spanner and a “Monday” hammer. This was so called because it weighed 28lbs, and if you used it on a Monday, you were on the sick for the rest of the week!» —“Re: Hire or Beg Steal or Borrow…” by Learner Turner Ask The Trades (U.K.) May 19, 2004. (source: Double-Tongued Dictionary)
Further reading
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...
Cat hair may be something you brush off, but cat hair is also a slang term that means “money.” In the same way, cat beer isn’t alcoholic — some people use cat beer as a joking term for “milk.” And imagine walking on a...