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Jyutping mou5 min2 bei2
Pinyin mǎo miàn bǐ

Definitions (粵典–words.hk)
  1. 名詞
    唔​尊重​或者​優待​一個​輩份​比​自己​高​或者​理應​畀​面​嘅​人
    to show disrespect, to be uncompromising
    • 阿叔又點呀,佢搞我條女就一樣冇面畀。
      阿叔又点呀,佢搞我条女就一样冇面畀。
      It doesn't matter if he is my uncle, I won't treat him as one if he touches my girl.
  2. 名詞
    響​紛爭​之中​唔​向​對​方退​讓
    to refuse to compromise or back down in a conflict
    • 佢而家嚟拆我竇,同門都冇面畀。
      佢而家嚟拆我窦,同门都冇面畀。
      He is shutting my places, I won't back down even if we share the same master.

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Jyutping mou5 min6 bei2
Pinyin mǎo miàn bǐ

Definitions (CC-CANTO)
  1. to describe not to favor somebody, even though the two people may share a good, close relationship