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
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...
There are eight major planets, but more than a million minor ones, including asteroids. If you discover one, you get the honor of naming it. The Dictionary of Minor Planet Names includes minor planets named for rock bands, jazz musicians, poets, and...