1. 迷迷糊糊的;昏昏欲睡的;昏昏沉沉的
Someone who is dopey is sleepy, as though they have been drugged.

2. 愚蠢的;糊涂的
If you describe someone as dopey, you mean that they are rather stupid.

1. having or revealing stupidity

e.g. ridiculous anserine behavior
a dopey answer
a dopey kid
some fool idea about rewriting authors' books

Synonym: anserinedopyfoolishgooseygoosygooselikejerky