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Jyutping mou5 sing1 mou5 hei3
Pinyin mǎo shēng mǎo qì

Definitions (Wiktionary)
  1. adj, Cantonese
    with no news or update from something

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Jyutping mou5 seng1 mou5 hei3
Pinyin mǎo shēng mǎo qì

Definitions (CC-CANTO)
  1. no news or updates/hopeless/unsuccessful/lack of energy
Definitions (粵典–words.hk)
  1. 形容詞
    一段​長​時間​冇​收到​或​發出​回應
    to have yet to receive or send responses
    • 阿明呢段時間都冇聲冇氣,唔講我仲以為佢今晚唔嚟。
      阿明呢段时间都冇声冇气,唔讲我仲以为佢今晚唔嚟。
      aa3 ming4 ni1 dyun6 si4 gaan3 dou1 mou5 seng1 mou5 hei3, m4 gong2 ngo5 zung6 ji5 wai4 keoi5 gam1 maan1 m4 lai4.
      I haven't heard from Ah Ming for a while, so I thought he wasn't coming tonight if you didn't tell me.
Examples (粵典–words.hk)
  1. Cantonese
    阿明呢段时间都冇声冇气,唔讲我仲以为佢今晚唔嚟。
    阿明呢段時間都冇聲冇氣,唔講我仲以為佢今晚唔嚟。
    aa3 ming4 ni1 dyun6 si4 gaan3 dou1 mou5 seng1 mou5 hei3, m4 gong2 ngo5 zung6 ji5 wai4 keoi5 gam1 maan1 m4 lai4.
    • I haven't heard from Ah Ming for a while, so I thought he wasn't coming tonight if you didn't tell me.