black mark

noun

noun

Idiomatic Something that negatively affects someone's reputation.

"It taints your CV as people look at it and see what's gone on and it does put a bit of a black mark against you," says the man who, in 2006, was head hunted by Preston only for his tenure to be brought to a halt 17 months later.2011 April 6, Aimee Lewis, quoting Paul Simpson, “Management after the sack”, in BBC Sport:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.