English to English

noun (n)

• someone who gossips indiscreetly(noun.person)

  Synonym:
  blabbermouth, taleteller, tattler, tattletale, telltale
  

  source: wordnet30
• One who officiously tells tales; one who impertinently or maliciously communicates intelligence, scandal, etc., and makes mischief.(noun)

  source: webster1913