shoot their mouth off

• vi. 夸夸其谈(信口开河；吹牛；夸大)

例句

用作不及物动词 (vi.)

1. From what you say, their papers are phony.
   照你说的情况看，他们的报纸是吹牛啦。
2. He also knows that Iranian President Mahmoud Ahmadinejad's threat to wipe Israel off the map is bombast.
   他还知道伊朗总统内贾德威胁把以色列从地图上抹掉的说法只是吹牛。