飄忽不定 [飘－－－]

Jyutping piu1 fat1 bat1 ding6
Pinyin piāo hū bù dìng

Definitions (CC-CEDICT)
  1. to drift without a resting place (idiom)
  2. roving
  3. errant
  4. vagrant
  5. erratic
Definitions (Wiktionary)
  1. phrase, idiomatic
    to be unsteady in motion; to drift from place to place; to be erratic