Cheshire Smile

A most memorable character, the Cheshire cat and his smile are famous. The broad smile often comments like: He's smiling like a Cheshire cat waiting for something. 

In the story of Alice in Wonderland that cat explains that he 'isn't all there' which goes quite well with his mischievous grin and giggly laugh. 

But the Cheshire smile has a sinister side as well. Also known as the Glasgow smile is the signature disfigurement inflicted on the victims of a beating from the Chelsea Headhunters. Gang members cut the edges of the person's mouth, then beat them in the face until the cuts widen across the face until the wound spreads from ear to ear.