blabbermouth russian

• трепло́

  chatterbox, windbag, bigmouth, blabbermouth

• балабо́л

  chatterbox; blabbermouth

  big talker; windbag

Examples

• Том болту́н.

  Tom is a blabbermouth.

• Я тако́е трепло́.

  I'm such a blabbermouth.