吸風飲露 [－风饮－]

Jyutping kap1 fung1 jam2 lou6
Pinyin xī fēng yǐn lù

Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    to not eat
  2. phrase, idiomatic, literally, of celestial beings
    to eat and drink wind and dew as food