blackmark

noun
UK /ˈblæk mɑːk/
US /ˈblæk mɑːrk/

A black mark is a bad note that shows you did something wrong.

Talking in class gave him a black mark on his school record.


OTHER MEANINGS

2. A dark spot or stain on a surface.

There was a black mark on the wall where the chair had scraped it.

3. A lasting sign of shame or disapproval attached to a person or action.

The scandal left a black mark on the company's reputation.

4. A negative entry recorded against someone, especially in school or work.

Late homework earned her a black mark from the teacher.

5. A mark made with black ink or pigment.

He circled the answer with a black mark of his pen.