noun
- a stupid or slow-witted person
Usage: informal
Examples
- Don’t be such a dunderhead—the answer is obvious.
- He felt like a complete dunderhead after making that mistake.
- Only a dunderhead would forget to bring an umbrella on a rainy day.
- She called her brother a dunderhead for losing his keys again.
- The teacher was patient even with the biggest dunderhead in class.
- What kind of dunderhead leaves the car running all night?