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Jyutping naai5 fan2 cin2
Pinyin nǎi fěn qián

Definitions (粵典–words.hk)
  1. 名詞
    用響​自己​小朋友​身上​嘅​錢​,​例如​教育​、​嘢​食​咁
    money for one's child's food and education; literally, money for powdered milk
    • 佢為咗賺奶粉錢,再度出山。
      佢为咗赚奶粉钱,再度出山。
      keoi5 wai6 zo2 zaan6 naai5 fan2 cin2, zoi3 dou6 ceot1 saan1.
      She is working again, to earn some extra cash for her child.

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Jyutping naai5 fan2 cin4*2
Pinyin nǎi3fen qián

Definitions (CC-CANTO)
  1. milk money [written and colloquial]; living and education cost for raising a child [colloquial]
Examples (粵典–words.hk)
  1. Cantonese
    个歌手封咗咪十年,最后咪又系为奶粉钱 出山。
    個歌手封咗咪十年,最後咪又係為奶粉錢 出山。
    go3 go1 sau2 fung1 zo2 mai1 sap6 nin4, zeoi3 hau6 mai6 jau6 hai6 wai6 zo2 naai5 fan2 cin2 ceot1 saan1.
    • That singer retired ten years ago, but at the end succumbed to the temptation of earning extra for her child and resumed to the stage.
  2. Cantonese
    佢为咗赚奶粉钱,再度出山。
    佢為咗賺奶粉錢,再度出山。
    keoi5 wai6 zo2 zaan6 naai5 fan2 cin2, zoi3 dou6 ceot1 saan1.
    • She is working again, to earn some extra cash for her child.