If you smart off to the wrong people, they could hit you in the face.

如果你对错误的人的无礼，他们可能就会扇你。

Smarting off to someone means you are saying rude comments and showing a lack of respect.

“ smart off to sb”意思是你对某人说出一些粗鄙的言论，显得不敬。

We often pair " smart" with " off" to make a very useful phrasal verb -- to smart off.

我们经常将“smart”和“off”组成一个非常好用的动词短语使，“ smart off”。

Or " Do NOT smart off in class! "

或者“不要在课堂上自作聪明！”

The teacher may say to her, " Do not get smart with me, young lady! " Or " Do NOT smart off in class! "

这个老师可能会对她说，“不要对我无礼，小姑娘！”或者“不要在班上说话无礼！”