Definition of "bonehead" [bone•head]

• Informal A stupid person; a dunce. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This popularized the slang term bonehead, an American alteration of the British blockhead."
• "What the Americans call a bonehead became what the English call a hard-headed man."
• "I actually dont 'have a dietician so I have no one to call a bonehead!"