口蜜腹劍 [－－－剑]

Jyutping hau2 mat6 fuk1 gim3
Pinyin kǒu mì fù jiàn

Definitions (CC-CEDICT)
  1. lit. honeyed words, a sword in the belly (idiom); fig. hypocritical and murderous
Definitions (粵典–words.hk)
  1. 形容詞
    表面​奉迎​，​暗地​裏​謀​害人​地
    two-faced; on the surface fawning and docile, inwardly scheming with malicious intent against others
    • 佢份人口蜜腹劍，唔好睇佢不停讚你，其實佢隊你兩刀。
      佢份人口蜜腹剑，唔好睇佢不停赞你，其实佢队你两刀。
      Careful on that two-faced guy, he may be praising you by now, but he may betray you anytime.
Definitions (Wiktionary)
  1. phrase, idiomatic
    sweet words, but a wicked heart
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）
Examples (粵典–words.hk)
  1. Cantonese
    佢份人口蜜腹剑，唔好睇佢不停赞你，其实佢队你两刀。
    佢份人口蜜腹劍，唔好睇佢不停讚你，其實佢隊你兩刀。
    • Careful on that two-faced guy, he may be praising you by now, but he may betray you anytime.