長命債長命還 [长－债长－还]

Jyutping coeng4 meng6 zaai3 coeng4 meng6 waan4
Pinyin cháng mìng zhài cháng mìng hái

Definitions (CC-CANTO)
  1. a huge debt that will take a lifetime to repay slowly
Definitions (粵典–words.hk)
  1. 語句
    指爭​落​人​嘅​錢​或者​承諾​，​要​慢慢​還
    to pay one's debts slowly; literally: life-long debt, life-long repayment
Definitions (Kaifangcidian)
  1. 慢慢還債 – 慢慢还债
  2. 慢慢兒還債 – 慢慢儿还债