My message is "If you try to smuggle drugs you are stupid."

我的讯息是，“你若企图走私毒品，那是犯傻。”

《柯林斯英汉双解大词典》

The problem is that you don't know you are stupid.

问题在于你不知道自己的愚蠢。

youdao

You ARE stupid.

你真是笨啊！

youdao

Are you stupid or something? Mama says,"Stupid is as stupid does."

VOA: standard.other

These are stupid questions, because once you understand what they're asking, the answer is just built in. It follows trivially.

这是些很愚蠢的问题,因为一旦你明白了他们的问题,答案就在其中,一切简单明了

耶鲁公开课 - 死亡课程节选

Instead, right off the bat you have some stupid number and you are dragging that through the calculations.

相反，在交卷时，你得到一些愚蠢的数字,并且你还把它用在整个计算中。

麻省理工公开课 - 固态化学导论课程节选

We are talking about animals that have a brain that has 0.1 milligrams in weight, so ants are rather stupid animals if you put it that way.

NPR: Mole-Rats, Ants Making Science Headlines

You are scared stupid at what you are doing, but it is also exciting and makes you feel less lonely in the world.

NEWYORKER: Miss Lora