noun (n)

• one who reveals confidential information in return for money(noun.person)

  Synonym:
  betrayer, blabber, informer, rat
  

  source: wordnet30
• domestic swine(noun.animal)

  Synonym:
  grunter, hog, pig, sus scrofa
  

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

  source: webster1913