Erik Sprague, known professionally as the Lizardman, is an American freak show and sideshow performer. He is best known for his body modification, including his sharpened teeth, full-body tattoo of green scales, bifurcated tongue, subdermal implants and green-inked lips.

A subdermal implant is a body modification placed under the skin, allowing the body to heal over the implant and creating a raised design. Such implants fall under the broad category of body modification. Many subdermal implants are made out of silicone, either carved or mold injected. Many people who have subdermal implants use them in conjunction with other types of body modification to create a desired, dramatic effect. This process is also known as a 3-D implant, or pocketing.