rat spill n. the accidental importation of rats to a rat-free island (or, rarely, to any rat-free piece of land). (source: Double-Tongued Dictionary)
Further reading
It’s hard to imagine now, but there was a time when people disagreed over the best word to use when answering the phone. Alexander Graham Bell suggested answering with ahoy! but Thomas Edison was partial to hello! A fascinating new book about...
If you skip wearing underwear, you’re said to be going commando. This bit of slang originated during the Vietnam War, when U.S. commandos had compelling reasons to do without that particular piece of clothing. Plus, Watergate salad is a...