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Jyutping ngaa4 caat3 sou1
Pinyin yá cā sū

Definitions (CC-CANTO)
  1. someone who likes to brag / boost [colloquial]
Definitions (粵典–words.hk)
  1. 名詞
    本來​係​《​黃​飛鴻​》​戲劇​系列​中​嘅​一​個​虛​構​角色​,​後​來​借代​指一個​人​相當​之牙​擦​(​量​詞​:​個​)
    a boastful person