belly ring

noun

jewelry

: an ornamental ring or piece of jewelry attached to the skin around the navel

According to a poll … in 1994, adolescent boys think belly rings are "sexy" or "cute," and most girls consider them desirable, if you have the right kind of body.—

Joan Jacobs Brumberg, The Body Project: An Intimate History of American Girls, 1998

Of course, as your pregnancy progresses and your tummy starts to jut out in earnest, you may find that your … belly ring becomes too uncomfortable to wear, thanks (or no thanks) to your taut, stretched-to-the-limit skin.—

Heidi Murkoff et al., What to Expect When You're Expecting, 2008