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Jyutping waa6 mou5 gam3 faai3
Pinyin huà mǎo hán kuài

Definitions (粵典–words.hk)
  1. 語句
    好快​;​嘢​都​未​講完​就​已經​完成​、​發生
    happened quickly; very fast; literally: to happen faster than it is spoken
  2. 參看
    話都冇咁快、話咁快