noun (n)

• someone who kills by strangling(noun.person)

  Synonym:
  garroter, garrotter, strangler, throttler
  

  source: wordnet30
• an unfortunate person who is unable to perform effectively because of nervous tension or agitation(noun.person)

  Example:
  He could win if he wasn't a choker.
  

  source: wordnet30
• necklace that fits tightly around a woman's neck(noun.artifact)

  Synonym:
  collar, dog collar, neckband
  

  source: wordnet30
• a high tight collar(noun.artifact)

  Synonym:
  neck ruff, ruff, ruffle
  

  source: wordnet30
• One who, or that which, chokes.(noun)

  source: webster1913