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Jyutping ji6 hau2 tung4 sing1
Pinyin yì kǒu tóng shēng

Definitions (CC-CEDICT)
  1. different mouths, same voice
  2. to speak in unison (idiom)
Definitions (粵典–words.hk)
  1. 形容詞
    兩個​以上​嘅​人​同​時​間​講​一​樣​嘅​嘢
    saying sth together; literally: different mouths but same voice
    • 大家異口同聲都話好。
      大家异口同声都话好。
      daai6 gaa1 ji6 hau2 tung4 sing1 dou1 waa6 hou2.
      Everybody said okay together.
Definitions (Wiktionary)
  1. phrase, idiomatic
    to speak with one voice; to say the same thing; to carry identical opinions; to be unanimous
    (syn.) 异口同辞, 異口同音, 异口同音, 異口同辭
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Definitions (HSK3.0)
  1. HSK3 七一九级词汇表 #4959
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    大家异口同声地说:“那家伙是个好人。”
    大家異口同聲地説:“那傢伙是個好人。”
    dà jiā yì kǒu tóng shēng dì shuō :“ nà jiā huo shì gè hǎo rén 。”
    • He's a nice guy - that's unanimous.
Examples (粵典–words.hk)
  1. Cantonese
    大家异口同声都话好。
    大家異口同聲都話好。
    daai6 gaa1 ji6 hau2 tung4 sing1 dou1 waa6 hou2.
    • Everybody said okay together.
  2. Cantonese
    异口同声
    異口同聲
    ji6 hau2 tung4 sing1
    • saying something together; literally, different mouths but same voice