脱口而出

wǒ hái méi lái de jí zhì zhǐ tā jiù yǐ tuō kǒu ér chū

我还没来得及制止，他就已脱口而出。

He blurted it out before I could stop him.

dāng rán wǒ tuō kǒu ér chū shuō shì de

当然，我脱口而出说是的。

Of course, I automatically said yes.

tā zài cì chū chǎng miào yǔ tuō kǒu ér chū

她再次出场妙语脱口而出。

She appears once again with a ready quip.