A Glasgow smile (also known as a Chelsea grin or Chelsea Smile) is a nickname for the practice of cutting a victim's face from the edges of the mouth to the ears: the cut - or its scars - form an "extension" of what resembles a smile.
I also just read that the whole curbstomping thing is another description.
I know about the typo. =) i'll fix it when i hear if they like it or not.
