素面朝天 [－－－－]

Jyutping sou3 min6 ciu4 tin1
Pinyin sù miàn cháo tiān

Definitions (CC-CEDICT)
  1. lit. to present oneself confidently to the emperor, without makeup (as did the sister of Yang Guifei 楊貴妃|杨贵妃[Yang2 Gui4 fei1]) (idiom)
  2. fig. (of a woman) to show one's natural features, without makeup
  3. to present oneself just as one is, without artifice
Definitions (Wiktionary)
  1. phrase, historical, idiomatic, literary
    to present oneself to the emperor without any makeup
  2. phrase, figuratively, idiomatic, of a woman
    to wear no makeup; to show one's natural features; to present oneself just as one is