adjective
- extremely stupid or foolish
Usage: informal
Examples
- That was a boneheaded mistake that cost us the game.
- His boneheaded decision to drive in the storm nearly caused an accident.
- The company made a boneheaded move by firing their best employees.
- I can’t believe I made such a boneheaded error on the test.
- The politician’s boneheaded comment sparked widespread criticism.
- It was boneheaded of me to forget my umbrella on such a rainy day.