好心倒做了驢肝肺 [－－－－－驴－－]

Jyutping hou2 sam1 dou2 zou6 liu5 leoi4 gon1 fai3
Pinyin hǎo xīn dào zuò le lǘ gān fēi

Definitions (CC-CEDICT)
  1. lit. to mistake good intentions for a donkey's liver and lungs (idiom)
  2. fig. to mistake good intentions for ill intent