Don't act like dumbclucks; read the instructions before you proceed.

The physicist compared the energy distribution to classic dumbbell curves to explain the two dominant states.

After two failed attempts to fix the sink, I had to laugh at my own dumbasshood.

After three reckless pranks in a row, his friends joked that he'd achieved a new level of dumbassdom.

The dumbbutts in the meeting kept interrupting everyone, so I decided to take detailed notes and send them a summary later.

That was a dumbbutt move; you should think before acting.

I can't believe he called me a dumbbutt during the meeting.