Definition of "boneheadedness" []

• The state or quality of being boneheaded. (noun)

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• "But it bothered me all day, woke me up at night, and of course it's been on my mind this morning, until I read about your boneheadedness."
• "Rereading Charlie's TV columns in the Guide from 2000 to 2010, the striking thing is how quickly and incisively he skewered the core of each show, pinpointing either its brilliance or boneheadedness."
• "For sheer boneheadedness, it'll be tough to top Cory Gardner's attack ad against Democratic Rep. Betsy Markey of Colorado."