loose jaw

例句：

1. 1.He was a loose jaw who liked to brag about his achievements.
   他是个爱吹嘘自己成就的不守规矩的人。
2. 2.The police were called to the scene after a loose jaw caused a disturbance.
   警方被叫到现场处理一起由不守规矩的人引起的骚乱。
3. 3. The loose jaw of the car broke the window and shattered the glass.
   汽车的松口导致车窗破碎。