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
If you’re ever near a sundial, step closer and look for a message. Many sundials bear haunting, poetic inscriptions about the brevity of life. Plus, language development in toddlers: why and how little ones pick up the exclamation Uh-oh...
In a sweaty letter to a friend while vacationing on the island of Elba, poet Dylan Thomas wrote colorfully and expressively about a terrible heat wave, complaining that, among other things, “My brains are hanging out like a dog’s tongue...