The fat fellow is as stupid as a goose.

那个胖家伙蠢得像鹅一样。

youdao

He is as stupid as a donkey.

他和驴子一样蠢。

youdao

But Bree had no intention of letting all the crowd know that he could talk, and stood looking just as stupid as a horse can.

但布里无意让所有的人都知道它能说人话，它站在那儿，看上去愚蠢得像匹最愚蠢的马儿。

youdao

Peace would have given this donkey a chance to escape from ever being found out as being so stupid.

VOA: special.2010.03.27

"What we've got to do is to make sure that in the year 2041 that we are not stupid enough as a world to go to Antarctica, which is not owned by anybody, and exploit it for fossil fuels."

VOA: standard.2009.12.10

However, there is such a thing as a stupid answer, a bad answer or a dumb answer.

FORBES: Stop Worrying About The Questions -Media Training

Additionally, there is no such thing as a stupid question, an ignorant question or a leading question.

FORBES: Stop Worrying About The Questions -Media Training

Cops not only were largely portrayed as a stupid and brutish lot, they also frequently were depicted as comic buffoons whom no one took seriously and whose demands usually were ignored.

FORBES: On Labor Day, What It Means To "Do Our Jobs"