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Jyutping saai1 gwai2 hei3
Pinyin sāi guǐ qì

Definitions (Kaifangcidian)
  1. 白費勁兒 – 白费劲儿
Examples (粵典–words.hk)
  1. Cantonese
    睬佢都嘥鬼气。
    睬佢都嘥鬼氣。
    coi2 keoi5 dou1 saai1 gwai2 hei3.
    • Responding to him/paying him any attention is a waste of time.