師奶牌 [师－－]

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Definitions (粵典–words.hk)
  1. 名詞
    形容​賭注​開得​好​細​嘅​賭​局​；​通常​指​麻雀
    a game with very low stakes, usually gambling games such as mahjong
    • 佢哋淨係打埋晒啲師奶牌，都唔夠過癮嘅。
      佢哋净系打埋晒啲师奶牌，都唔够过瘾嘅。
      they are only playing mahjong with little stakes, that's not exciting enough.

師奶牌 [师－－]

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Pinyin shi1nāi pái

Definitions (CC-CANTO)
  1. to play mahjong with a very low stakes, usually for fun only [colloquial]
Examples (粵典–words.hk)
  1. Cantonese
    佢哋净系打埋晒啲师奶牌，都唔够过瘾嘅。
    佢哋淨係打埋晒啲師奶牌，都唔夠過癮嘅。
    • they are only playing mahjong with little stakes, that's not exciting enough.