dead water
n.— «Not all of the products look like water; they can be pink, yellow, green or blue. They don’t always taste like water—they may be flavored with cherimoya, pomegranate, sugar or herbs. And unlike regular H20 (or “dead water,” as it is sometimes called by enhanced-water marketers), these beverages often contain calories, although not as many as, say, a Coke.» —“Meet water’s cooler cousins” by Hilary E. MacGregor Los Angeles Times Jan. 16, 2006. (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...