A row of piercings vertically parallel and symetrical to another row, fashioned with rings allowing a ribbon to be threaded through in the style of a corset. Most often done on the back but can be done on the side too. Sometimes done for one night then all the rings are removed to allow healing.
"I'm thinking about getting a corset piercing for the concert."
"Aren't you afraid it'll get torn out?"
"Naw, it's gonna be mostly posers there, otherwise I'd be moshing."