ぺちゃくちゃ

adverb, noun or participle which takes 'suru'

chattering; prattling; chit-chatting

Onomatopoeic word for light, continuous, often trivial talk, especially among women or in casual settings. Can be used adverbially or with する.

• 隣となりの部屋へやからぺちゃくちゃ話はなす声こえが聞きこえる。

  I can hear chattering voices from the next room.