rat hole
n.— «She also started to learn the offshore patois used to describe the different parts of the platform: the dog house, the monkey board, the rat hole, the cat walk.» —“Taking oil painting to a whole new platform” by Susan Mansfield The Scotsman (Scotland) Nov. 16, 2004. (source: Double-Tongued Dictionary)
Further reading
If you speak a second or third language, you may remember the first time you dreamed in that new tongue. But does this milestone mean you’re actually fluent? And a couple’s dispute over the word regret: Say you wish you’d been able...
While reading Dean Koontz’s book The House at the End of the World (Bookshop|Amazon), a listener in Ramona, California, encountered the perfect word for the walks he takes with his dog. He now refers to such an excursion as a sniffari. This is...