ひそひそ話ばなし

noun

whispered conversation; whispering

Refers to a conversation held in whispers, often with a nuance of secrecy or gossip.

• 隣となりの席せきからひそひそ話ばなしが聞きこえてきた。

  I could hear whispered conversation from the next seat.

• 二人ふたりは隅すみでひそひそ話ばなしをしていた。

  The two were whispering together in the corner.