A big smile that shows you're satisfied, excited, or just really happy. Named for that big smile on your face when you're opening up your presents on Christmas morning and you actually get (or think you're getting) what you really wanted.
Person 1: What's with the Christmas smile? Did you just get some?
Person 2: ;) wouldn't you like to know?
Person 2: ;) wouldn't you like to know?
by twilight shimmer March 23, 2007