A barbell is a body piercing jewelry with a similar shape to a barbell used for weight lifting. A barbell is used for body piercing and can come in a variety of sizes and shapes. It can also be made of different materials, although surgical stainless steel is the most common. It is a rod with a ball on each end - one ball is permanently attached and the other screws on and off.

Variations: straight barbell, curved barbell (banana bell), circular barbell

A curved barbell is simply a barbell with some curvature to it, to accommodate piercings that are done in places that are similarly curved in the human anatomy (i.e. eyebrow, navel, genitals)