信口雌黃 [－－－黄]

Jyutping seon3 hau2 ci1 wong4
Pinyin xìn kǒu cī huáng

Definitions (Wiktionary)
  1. phrase, idiomatic
    to make irresponsible remarks, to utter nonsense

信口雌黃 [－－－黄]

Jyutping seon3 hau2 ci1 wong4
Pinyin xìn kǒu cí huáng

Definitions (CC-CEDICT)
  1. to speak off the cuff
  2. to casually opine
Definitions (粵典–words.hk)
  1. 語句、書面語
    本指​稱​讚​晉​代王​衍能夠​隨口​更正​講​錯​嘅​説​話​，​後​來​比喻​不顧​事實​真相​，​隨口​批評​。​雌黃即​雞冠石​，​過去​寫​字​用黃紙​，​寫錯​咗​就​用​黃​色​嘅​雌​黃​塗​抹​後​重​寫​。
    to make irresponsible remarks; wag one's tongue too freely;
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）
Examples (Wiktionary)
  1. Mandarin
    信口雌黄
    信口雌黃
    xìn kǒu cí huáng
    • to make irresponsible remarks (lit. to correct someone with at will)