The term "Labret" is often used to refer to both the piercing itself and the style of jewellery used in the piercing.
Labret As A Piercing
A Labret piercing is a located is located in the centre right below your bottom lip.
Labret As a Type of Jewellery
Labrets (also known as Labret Studs) have a flat back plate attached to the bar on one end, and a top that can be unscrewed/removed on the other end. The tops are offered in a wide range of designs.
Labrets can be worn as lip piercings, ear piercings, and even nose piercings!