As far as the most devious and subtle of villains are concerned, when it comes to facial expression, less is more. A Cheshire Cat Grin only warns people that something's afoot; a Slasher Smile is even more glaringly obvious. No, when someone's about to walk straight into your Death Trap or your Evil Plan is about to pay big dividends, it's best to show your smug superiority with a devious little [...] [tvtropes.org]