blue ice
n.— «Stan Walchesky and neighbors on Neupert Road in Jefferson began noticing the stuff last week and speculated that it was “blue ice,” the euphemism for the chemically treated lavatory waste that sometimes falls from airplanes.» —“At least Prince isn’t a suspect” by Brand Keat Pittsburgh Tribune-Review (Pa.) Dec. 23, 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...