a black mark against someone
a black mark against (one)
A long-lasting negative impact of a mistake that harms one's reputation. Jerry's speeding ticket was a black mark on his driving record that prevented him from getting a job as a delivery man.
a black mark against someonesomething that someone has done that is disliked or disapproved of by other people.
The literal meaning of the phrase is a black cross or spot marked against the name of a person who has done something wrong.