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Jyutping mou5 sam1 zong1 zoi3
Pinyin mǎo xīn zhuāng zài

Definitions (CC-CANTO)
  1. to refer somebody does not pay much attention, or give much effort into doing something
Definitions (粵典–words.hk)
  1. 語句
    唔​上心​、​唔​在意
    indifferent; not caring
    • 連我有食物敏感都唔知,你都冇心裝載嘅。
      连我有食物敏感都唔知,你都冇心装载嘅。
      lin4 ngo5 jau5 sik6 mat6 man5 gam2 dou1 m4 zi1, nei5 dou1 mou5 sam1 zong1 zoi3 ge5.
      You are not caring enough as you don't even know that I have a food allergy.
Definitions (Wiktionary)
  1. verb, Cantonese
    to not care; to be indifferent
Definitions (Kaifangcidian)
  1. 不關心 – 不关心
  2. 不在乎
  3. 沒心思 – 没心思
  4. 心不在焉
  5. 漫不經心 – 漫不经心
Examples (粵典–words.hk)
  1. Cantonese
    连我有食物敏感都唔知,你都冇心装载嘅。
    連我有食物敏感都唔知,你都冇心裝載嘅。
    lin4 ngo5 jau5 sik6 mat6 man5 gam2 dou1 m4 zi1, nei5 dou1 mou5 sam1 zong1 zoi3 ge5.
    • You are not caring enough as you don't even know that I have a food allergy.
  2. Cantonese
    冇心装载
    冇心裝載
    mou5 sam1 zong1 zoi3
    • not paying attention to and being forgetful about someone's words or advice; literally, no heart to carry loads