打開天窗說亮話 [－开－－说－话]

Jyutping daa2 hoi1 tin1 coeng1 syut3 loeng6 waa6
Pinyin dǎ kāi tiān chuāng shuō liàng huà

Definitions (CC-CEDICT)
  1. (let's) not mince words; (let's) not beat about the bush
Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    to speak candidly; to not beat around the bush