vulture pit
n.— «A vulture pit is an opencast operation that cuts into and through previous deep mine workings.» —“Open cast asides” by Gareth Davis A Councillor Writes (Cramlington, Northumberland, U.K.) July 11, 2004. (source: Double-Tongued Dictionary)
Further reading
A flashlight doesn’t flash. It provides a steady beam of light. So why is it called a flashlight? The earliest versions lit up only briefly before the batteries gave out and required a recharge, so they were literally “flash lights...
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...