指冬瓜話葫蘆 [－－－话－芦]

Jyutping zi2 dung1 gwaa1 waa6 wu4 lou2
Pinyin zhǐ dōng guā huà hú lu

Definitions (CC-CANTO)
  1. verb; literally: pointing at the winter melon but talk about gourd. It means abuse a person by ostensibly pointing to someone else