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Jyutping gou1 toi4 gwai3 sau2
Pinyin gāo tái guì shǒu

Definitions (粵典–words.hk)
  1. 語句
    請​求人​哋​仁慈​、​寬大
    to plead someone to show mercy, to be lenient; literally: highly raise your noble hand
    • 阿sir,呢個阿婆擺檔都係想自力更生啫,可唔可以高抬貴手,放佢一馬呢?
      阿sir,呢个阿婆摆档都系想自力更生啫,可唔可以高擡贵手,放佢一马呢?
      Sir, this old granny being hawker is just trying to rely on her own for a living, can you show some mercy and let her go ?
  2. 近義詞
    從輕發落、手下留情
Definitions (Wiktionary)
  1. phrase, idiomatic
    An expression for requesting forgiveness or accommodation: to be generous; to be magnanimous; (ironic) give me a break

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Jyutping gou1 toi4 gwai3 sau2
Pinyin gāo tái guì shǒu

Definitions (CC-CEDICT)
  1. to be generous (idiom)
  2. to be magnanimous
  3. Give me a break!
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    高擡贵手
    高抬貴手
    gou1 toi4 gwai3 sau2
    • please show mercy
  2. Cantonese
    阿sir,呢个阿婆摆档都系想自力更生啫,可唔可以高擡贵手,放佢一马呢?
    阿sir,呢個阿婆擺檔都係想自力更生啫,可唔可以高抬貴手,放佢一馬呢?
    • Sir, this old granny being hawker is just trying to rely on her own for a living, can you show some mercy and let her go ?