[---]

Jyutping dak1 baa2 hau2
Pinyin dé bǎ kǒu

Definitions (粵典–words.hk)
  1. 語句
    淨​係​講​,​唔​會​做​;​通常​指​某個​人​自大​,​自以​為​是
    merely talk, no actions taken; boasting; literally: only has a mouth
    • 你咪聽佢講,佢得把口㗎咋。
      你咪听佢讲,佢得把口㗎咋。
      nei5 mai5 teng1 keoi5 gong2, keoi5 dak1 baa2 hau2 gaa3 zaa3.
      Don't listen to him. He's all talk.
Definitions (Wiktionary)
  1. adj, Cantonese
    all talk and no action
    (syn.) 得把聲, 得把声
Definitions (Kaifangcidian)
  1. 瞎吹
  2. 光說不做 – 光说不做
  3. 光說不幹 – 光说不干
  4. 只說不做 – 只说不做
  5. 說得好聽 – 说得好听
  6. 光說不練 – 光说不练
  7. 只會說不會做 – 只会说不会做
  8. 就會耍嘴皮子 – 就会耍嘴皮子

[---]

Jyutping dak1 baa2 hau2
Pinyin de bǎ kǒu

Definitions (CC-CANTO)
  1. (slang) someone is only talk but no action; all mouth and no trousers
Examples (粵典–words.hk)
  1. Cantonese
    你咪听佢讲,佢得把口㗎咋。
    你咪聽佢講,佢得把口㗎咋。
    nei5 mai5 teng1 keoi5 gong2, keoi5 dak1 baa2 hau2 gaa3 zaa3.
    • Don't listen to him. He's all talk.