fink

Noun

• someone acting as an informer or decoy for the police

Verb

• confess to a punishable or reprehensible deed, usually under pressure

• take the place of work of someone on strike

Related words

• Synonyms: 
  snitch , snitcher , stoolpigeon , stool pigeon , stoolie , sneak , sneaker , canary , confess , squeal , scab , rat , blackleg