七嘴八舌 (qī zuǐ bā shé): lively discussion with everybody talking at once

As soon as the class bell rang, the students all started talking at once about where to go for a spring outing on the weekend.

At the meeting everyone talked at once and put forward many different opinions; for a moment the host didn't know whom to listen to.

Seeing the traffic accident, the passersby were all talking at once, and some even took out their phones to take pictures.

At the family gathering, the relatives all asked Xiaoming at once when he was getting married, which made him very embarrassed.