dunce cap

American  

Or dunce's cap

noun

1. a tall, cone-shaped hat formerly worn by slow or lazy students as a punishment in school.

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dunce cap British  

noun

1. a conical paper hat, formerly placed on the head of a dull child at school

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Etymology

Origin of dunce cap

First recorded in 1830–40

Example Sentences

It’s about as academically relevant to today’s students as Sadie Hawkins Day, and as necessary as a dunce cap.

From Los Angeles Times

If you do think that he could, please step forward and claim your complimentary dunce cap, and infuse it with your own naivete.

From Salon

Ironically, she was punished in school for not being able to keep quiet and put in a corner with a dunce cap on her head.

From Los Angeles Times

But dunce caps aside, the irony is that Xi’s critique of Big Tech is similar to recent debates in the United States.

From Washington Post

Come December, the predictor will either be wearing a dunce cap or a genius cap.

From Los Angeles Times