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Jyutping min5 sei2 gam1 paai4
Pinyin miǎn sǐ jīn pái

Definitions (粵典–words.hk)
  1. 名詞
    古時​天子​獎賞​功臣​重臣​嘅​「​丹書​鐵券​」​,​可卸免​死罪​(​量​詞​:​塊​)​;​而家​代表​免罪​嘅​特​權
    (fig.) impunity; (lit.) golden plate of death exemption
    • 咪以為上司睇得起佢,就有免死金牌先得㗎。
      咪以为上司睇得起佢,就有免死金牌先得㗎。
      mai5 ji5 wai4 soeng6 si1 tai2 dak1 hei2 keoi5, zau6 jau5 min5 sei2 gam1 paai4 sin1 dak1 gaa2.
      It's foolish to think that he enjoys impunity simply because he is highly valued by his boss.
Definitions (Wiktionary)
  1. noun, historical
    death-exemption plate (plate bestowed by emperor allowing one to be exempt from death penalty)
  2. noun, figuratively
    immunity privileges; amnesty
Examples (粵典–words.hk)
  1. Cantonese
    免死金牌
    免死金牌
    min5 sei2 gam1 paai4
    • impunity; literally: golden plate of death exemption
  2. Cantonese
    咪以为上司睇得起佢,就有免死金牌先得㗎。
    咪以為上司睇得起佢,就有免死金牌先得㗎。
    mai5 ji5 wai4 soeng6 si1 tai2 dak1 hei2 keoi5, zau6 jau5 min5 sei2 gam1 paai4 sin1 dak1 gaa2.
    • It's foolish to think that he enjoys impunity simply because he is highly valued by his boss.