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Jyutping lam4 lou5 hok6 ceoi1 daa2
Pinyin lín lǎo xué chuī dǎ

Definitions (粵典–words.hk)
  1. 語句
    臨老先​嚟​學​新技能​,​通常​係​攞​嚟​取笑​;​「​打​」​係​指​啲​打
    an old person learning a new skill; usually used to mock those people; literally: old man learns to play trumpet

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Jyutping lam4 lou5 hok6 ceoi1 daa2
Pinyin lín lǎo xué chuī da

Definitions (CC-CANTO)
  1. useless to learn anything at an old age (slang)