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Jyutping mou5 lai4 zing3 ging1
Pinyin mǎo lí zhèng jīng

Definitions (粵典–words.hk)
  1. 形容詞、俚語
    嬉皮​笑​臉​,​一​啲​都​唔​正經​,​品行​同態度​規矩​都​唔​端莊
    used to criticise someone of joking about serious matters; literally: without a gram of seriousness
    • 大難臨頭,佢都仲冇厘正經,真係唔識死。
      大难临头,佢都仲冇厘正经,真系唔识死。
      daai6 naan6 lam4 tau4, keoi5 dou1 zung6 mou5 lei4 zing3 ging1, zan1 hai6 m4 sik1 sei2.
      Faced with absolute doom, he is still joking around, I don't think he knows how badly the situation is.
  2. 參看
    冇釐正經
Examples (粵典–words.hk)
  1. Cantonese
    大难临头,佢都仲冇厘正经,真系唔识死。
    大難臨頭,佢都仲冇厘正經,真係唔識死。
    daai6 naan6 lam4 tau4, keoi5 dou1 zung6 mou5 lei4 zing3 ging1, zan1 hai6 m4 sik1 sei2.
    • Faced with absolute doom, he is still joking around, I don't think he knows how badly the situation is.