wire
n.— «Those of us who conduct missions “outside the wire’ on a regular basis have come up with a variety of terms to refer to those who remain safe and comfortable on base.» —“Fobbits and other Iraqi critters” by Steve Smith in FOB Bernstein, Iraq ArmySteve Nov. 12, 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...