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Jyutping baau3 hoeng2 hau2
Pinyin bào xiǎng kǒu

Definitions (CC-CANTO)
  1. (verb) to divulge; to leak out or disclose to a secret
Definitions (粵典–words.hk)
  1. 動詞、俚語
    講左個​秘密​出去
    to blow a whistle; to blurt out something; to let a secret slip out; to disclose a secret; literally: to burst out with a loud mouth
    • 我都叫左你唔好爆響口,依家個個都知晒我嘅秘密喇!
      我都叫左你唔好爆响口,依家个个都知晒我嘅秘密喇!
      ngo5 dou1 giu3 zo2 nei5 m4 hou2 baau3 hoeng2 hau2, ji1 gaa1 go3 go3 dou1 zi1 saai3 ngo5 ge3 bei3 mat6 laa3.
      I told you not to let the secret slip, now everyone knows it!
Definitions (Wiktionary)
  1. verb, Cantonese
    to blow the whistle; to disclose a secret; to let a secret slip
Definitions (Kaifangcidian)
  1. 信口開河 – 信口开河
  2. 誇下海口 – 夸下海口
Examples (粵典–words.hk)
  1. Cantonese
    我都叫左你唔好爆响口,依家个个都知晒我嘅秘密喇!
    我都叫左你唔好爆響口,依家個個都知晒我嘅秘密喇!
    ngo5 dou1 giu3 zo2 nei5 m4 hou2 baau3 hoeng2 hau2, ji1 gaa1 go3 go3 dou1 zi1 saai3 ngo5 ge3 bei3 mat6 laa3.
    • I told you not to let the secret slip, now everyone knows it!