A Glasgow smile (also known as a Chelsea grin/smile, or a Glasgow, Smiley, Huyton, A buck 50, or Cheshire grin) is a wound caused by making a cut from the corners of a victim's mouth up to the ears, leaving a scar in the shape of a smile.
[2][3] The act is usually performed with a utility knife or a piece of broken glass, leaving a scar which causes the victim to appear to be smiling broadly.
[4] The practice is said to have originated in Glasgow, Scotland, in the 1920s and 30s.
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