Utility Knife of the Chelsea Headhunters

​Origin
A Glasgow smile (also known as a Chelsea smile or 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. The act is usually performed with a utility knife or piece of broken glass, leaving a scar which causes the victim to appear to be smiling broadly. The practice is said to have originated in Glasgow, Scotland in the 1920s and '30s, but became popular with English street gangs (especially among the Chelsea Headhunters, a London-based hooligan firm, among whom it is known as a "Chelsea grin" or "Chelsea smile"). This knife is angraved with the erect Chelsea lion symbol popular in the gang in the 60s.

​Effects
​When moved around someone's mouth, typically in the shape of a smile, a Chelsea smile will beging to appear on their face, beginning at the corners of their mouths and continuing to split up their cheeks and stopping somewhat short of the ears. This process is extremely painful to the victim, feeling like a real knife is cutting their flesh.

​Trivia

 * ​This is one of the artifacts used against Oto Barry by Scott in Retritaliation.