idiotic

How boring that idiotic Count is!

perform idiotic tricks out of sheer bravado

they're hoping that I'll bow to their idiotic arrangements without a bleat.

The model looked at her reflection in the mirror with an idiotic simper. Asmirk is an affected smile that often expresses an offensive smugness:

It was an idiotic mistake.

Don't make such an idiotic decision.

His idiotic behavior caused a lot of problems.

She made an idiotic comment during the meeting.

I can't believe how idiotic that plan is!

He always comes up with idiotic excuses.

The movie had an idiotic plot.

She made an idiotic joke that no one laughed at.

Their idiotic behavior embarrassed everyone at the party.

Stop making such idiotic comments!