check six
n.— «“It was a quick check six,” said the reservist from the Jacksonville area who flies for Federal Express, referring to a military parlance for looking to the rear.» —“Biker admits to speeding in fatal chase” by Jay Stapleton Daytona Beach News-Journal (Florida) Oct. 15, 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...
Chad in Hilliard, Florida, wonders about the expression old as Methuselah, meaning “extremely advanced in years.” The phrase references Methuselah, a figure in Jewish, Islamic, and Christian tradition said to be 969 years old when he...