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Jyutping lou5 kwai1 geoi2
Pinyin lǎo guī jǔ

Definitions (Wiktionary)
  1. noun
    old rules and regulations; convention; established custom or practice
    (syn.) 舊例, 老例, 老俗, 旧例

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Jyutping lou5 kwai1 geoi2
Pinyin lǎo guī ju

Definitions (CC-CANTO)
  1. old rules; customs (spoken)
Definitions (Wiktionary)
  1. noun
    old rules and regulations; convention; established custom or practice
    (syn.) 舊例, 老例, 老俗, 旧例
Examples (粵典–words.hk)
  1. Cantonese
    问我哋借钱系即日起钉架啦,呢啲老规矩嚟。
    問我哋借錢係即日起釘架啦,呢啲老規矩嚟。
    • To loan from us you have to pay the first batch of interest immediately, this is our general rule.