素昧平生 [－－－－]

Jyutping sou3 mui6 ping4 sang1
Pinyin sù mèi píng shēng

Definitions (CC-CEDICT)
  1. to have never met sb before (idiom); entirely unacquainted
  2. a complete stranger
  3. not to know sb from Adam
Definitions (粵典–words.hk)
  1. 語句
    同​另一人​從來​唔​認識
    to have never met someone before; to be entirely unacquainted
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）