二奶命 [－－－]

Jyutping ji6 naai1 meng6
Pinyin èr nǎi mìng

Definitions (CC-CANTO)
  1. one's destined to be second-in-line, like a concubine
Definitions (粵典–words.hk)
  1. 名詞、俚語
    成日​都​屈居​第二名​嘅​情​況
    state of always having to settle for second best; literally: the fate of being the second wife