adjective
- showing poor judgment or intelligence; foolish or stupid
Usage: informal
Examples
- That was a knuckleheaded decision to drive without checking the weather.
- His knuckleheaded comment embarrassed everyone at the meeting.
- Don’t be so knuckleheaded—think before you act.
- The knuckleheaded mistake cost the team the game.
- She made a knuckleheaded choice by not studying for the exam.
- His knuckleheaded behavior got him in trouble with the teacher.