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Jyutping sam1 zik6 hau2 faai3
Pinyin xīn zhí kǒu kuài

Definitions (CC-CEDICT)
  1. frank and outspoken (idiom)
  2. straight speaking
  3. to say what one thinks
Definitions (粵典–words.hk)
  1. 形容詞
    個性​直爽​,​講​嘢​坦白​唔​避忌​,​諗​到​咩​就講​咩
    frank and outspoken
Definitions (Wiktionary)
  1. phrase, idiomatic
    frank and outspoken; plainspoken and straightforward
    (syn.) 口快心直, 心直嘴快, 口直心快
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    心直口快
    心直口快
    sam1 zik6 hau2 faai3
    • frank and outspoken (literally 'to have a straight heart and a quick mouth')
Examples (Wiktionary)
  1. Mandarin
    心直口快
    心直口快
    xīn zhí kǒu kuài
    • frank and outspoken