black mark
noun/ˌblæk ˈmɑːk/
/ˌblæk ˈmɑːrk/
(British English)- a note, either in writing on an official record, or in somebody’s mind, of something you have done or said that makes people think badly of you
- She earned a black mark for opposing company policy.
- The public scandal was a black mark against him.
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black mark