Bonehead (noun)

A person who is foolish, stupid or stubborn.

Origin:

The origin of the word bonehead is uncertain, but it is thought to have originated in the early 20th century, as a slang term to refer to a person who is foolish, stupid or stubborn.

Examples:

1. He"s acting like a bonehead and won"t listen to reason.
2. You"re a bonehead if you think that"s going to work.
3. She thought he was a bonehead for refusing to listen to her advice.
4. He had the bonehead idea of trying to drive home after drinking.
5. He was called a bonehead for his stubborn attitude.