noun
- the quality or state of being stupid or foolish; lack of intelligence or good judgment
Usage: informal; derogatory
Examples
- His boneheadedness cost the team the championship game.
- I can't believe the boneheadedness of that decision.
- She shook her head at the sheer boneheadedness of the plan.
- The boneheadedness displayed by the manager was astounding.
- That was pure boneheadedness on my part.