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Jyutping man6 dou3 hau2 aa2
Pinyin wèn dào kǒu yǎ

Definitions (粵典–words.hk)
  1. 語句
    人​哋​問問​題​嘅​時​候​難​以​回答​嘅​狀​態
    to be rendered speechless by a question; to not know how to respond
  2. 參看
    問到口啞啞
Examples (粵典–words.hk)
  1. Cantonese
    佢面试冇准备到,所以俾人问到口哑哑。
    佢面試冇準備到,所以俾人問到口啞啞。
    keoi5 min6 si5 mou5 zeon2 bei6 dou3, so2 ji5 bei2 jan4 man6 dou3 hau2 aa2 aa2.
    • He wasn't prepared for the interview, so he wasn't able to answer any of the questions.