His dumbassed idea to jump the fence ended with him in the hospital.

Her dumbassity was on full display when she locked her keys in the car twice in one week.

I felt like a complete dumbass when I realized I had mailed the report to the wrong client.

That dumbass idea ruined our whole trip.

Don't be such dumbasses and read the instructions before you start.

In the heat of the argument, he declared himself the dumbassest person in the room, which only made everyone more uncomfortable.

After all that dumbassery, she decided it was time to grow up and face the consequences.

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.