airmail
n.— «Arriving officers were pelted with debris from the rooftops. The “airmail,” as the practice is known among police, stopped only after NYPD helicopters were called in and chased off the assailants with spotlights.» —“At least 10 people shot in lead-up to parade” by Sean Gardiner Newsday (Long Island, N.Y.) Sept. 5, 2005. (source: Double-Tongued Dictionary)
Further reading
Imagine telling someone how to get to your home, but without using the name of your street, or any other street within ten miles. Could you do it? We take street names for granted, but these words are useful for far more, like applying for a job or...
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...