blue helmet
n.— «Video footage seen by The Independent shows the bodies of many killed in the capital, Port-au-Prince, and contains testimony from witnesses claiming the victims were killed by “blue helmets”—common parlance for UN peacekeepers.» —“Peacekeepers accused after killings in Haiti” by Andrew Buncombe in Washington, D.C. Independen (U.K.) July 29, 2005. (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...