#informer__betrayer__rat__squealer__blabber  one who reveals confidential information in return for money
  supertype:  informant__source  a person who supplies information
  subtype:  fink__snitch__snitcher__stoolpigeon__stoolie__sneaker__canary  someone acting as an informer or decoy for the police
  subtype:  copper's_nark__nark  (British) an informer or spy working for the police
  subtype:  supergrass  (British) a police informer who implicates many people

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