Cheshire Cat

The Cheshire Cat (/ˈtʃɛʃər/ or /ˈtʃɛʃɪər/) is a fictional cat popularised by Lewis Carroll in Alice's Adventures in Wonderland and known for its distinctive mischievous grin. While most often celebrated in "Alice"-related contexts, the Cheshire Cat predates the 1866 novel and has transcended the context of literature and become enmeshed in popular culture, appearing in various forms of media, from political cartoons to television, as well as cross-disciplinary studies, from business to science. One of its distinguishing features is that from time to time its body disappears, the last thing visible being its iconic grin.

https://en.wikipedia.org/wiki/Cheshire_Cat