A decorative body ornament placed through the septum or nostril. Subsequently, not something you want to have pulled out violently. I witnessed a mishap of that nature first hand about two weeks ago, and the pullee, if you will, was not too happy. I believe the common consensus is that no body piercing is something you would like to have someone yank out in a fit of rage. However my dominatrix friend Sadie is shaking her head, indicating otherwise. One man's pain, another man's pleasure.