黑燈下火 [－灯－－]

Jyutping hak1 dang1 haa6 fo2
Pinyin hēi dēng xià huǒ

Definitions (CC-CEDICT)
  1. pitch dark
  2. also written 黑燈瞎火|黑灯瞎火[hei1 deng1 xia1 huo3]