sewing machine leg
n.— «Sometimes, it’s very painful to have very tight, contracted muscles. Some patients refer to it as their “sewing-machine” leg because it kind of bounces around. It can very bothersome, especially at night.» —“http://abcnews.go.com/Health/Healthology/story?id=572839″ by Christine Haran ABC News Mar. 11, 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...