Dunderhead (noun)

A person who is stupid or foolish.

Origin:

The word dunderhead comes from the dutch word donderkop, which means "thunderhead" or "dunce".

Examples:

1. He is such a dunderhead that he can't even tie his own shoelaces.
2. The dunderhead at the store gave me the wrong change.
3. Some people say that politicians are dunderheads who only think of themselves.
4. She was called a dunderhead by her classmates for not understanding the lesson.
5. The dunderhead's inability to follow instructions caused delays in the project.