Jones, why were you stupid enough to shoot your mouth off all over town about our plan to buy enough stock in that company to take it over?

琼斯，你怎么把我们准备购买那个公司的股票，然后再把它接收过来的计划到处乱说呢。你真是够傻的。

youdao

Don't shoot off your mouth if you don't know the facts.

不了解情况不要乱放炮。

《新英汉大辞典》

Don't shoot off your mouth, you might regret it later.

不要乱说话，你以后可能会后悔的。

youdao

Despite the prognostication of nearly every NFL pundit, the trash talkers won which means if you are going to shoot your mouth off, you better be able to deliver.

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