脸上抹黑 meaning in English

throw [sling] mud at ...; sling [cast; fling] manure on ..

The kgb pigeonholed his report and reprimanded him for denigrating a brother officer .
克格勃把他的调查报告扔在一边，不闻不问，反而说他往同志脸上抹黑。
Paint sb . black
往某人脸上抹黑
In behaving thus improperly at her table , these ladies were showing themselves anxious to do her an ugly turn
这伙女人在她家里这样胡闹，一定是想往她脸上抹黑。
Lincoln ' s three propositions in my several speeches , analyzed them , and pointed out what i believed to be the radical errors contained in them
第一，针对他的关于这个政府违反了上帝之规即分裂之家无可持存这种信条，我反驳道这是给我们宪法的不朽缔造者脸上抹黑。