sex bracelet

noun1

1. •
   A gel bracelet, in the context of an urban legend according to which the girl wearing the bracelet will engage in a sex act determined by the color of the bracelet, with whoever snaps it from her wrist.

   • Sex bracelets, rainbow parties, and sexting were all new concerns. Each quickly went from something that no one had ever heard of to activities that seemed ubiquitous. — 2014