choker
noun
[ ˈtʃəʊkə ]
• a necklace or ornamental band of fabric that fits closely round the neck.
• "her only ornament was a simple pearl choker"
• a cable looped round a log to drag it.
• an extremely upsetting experience.
• "saying our farewells—that was a bit of a choker"
• a sports player who fails to perform at a crucial point as a result of nervousness.
• "when I was playing on the tour, I was a choker"