數黑論白 [数－论－]

Jyutping sou2 hak1 leon6 baak6
Pinyin shǔ hēi lùn bái

Definitions (CC-CEDICT)
  1. to enumerate what is black and yellow (idiom); to criticize sb behind his back to incite quarrels
  2. also written 數黑論黃|数黑论黄[shu3 hei1 lun4 huang2]