A straight, curved or circular piece of
metal used as jewlery for piercings. Has a ball on each end that screws into the
shaft. Can be made of stainless steel, titanium or niobium. Sometimes acrylic plastics are used. The different shapes often get stupid nicknames, such as belly "ring" (a curved barbell); horseshoe (circular barbell) or tounge "ring" or "
stud" (a straight barbell). See also cbr.