widowmaker
n.— «The left main coronary artery is often referred to as “the widowmaker.” Mangini’s left main artery was 100 percent blocked.» —“I was one in a million” by Peggy O’Neill Independent Record (Helena, Mont.) Feb. 2, 2006. (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...