to react inappropiately to a situation due to a misunderstanding or a misinterpretation
Definitions (粵典–words.hk)
動詞
因為一個錯誤嘅前設底下而講錯嘢/搞錯人哋意思,導致有尷尬場面,特別係男女關係方面會用 (esp. in love affairs) to show the wrong emotion; to react inappropriately having misunderstood someone's meaning, usually something embarrassing would have happened because of that
個男仔之前以為我送曲奇餅畀佢係同佢示愛,於是表錯情。
个男仔之前以为我送曲奇饼畀佢系同佢示爱,于是表错情。
go3 naam4 zai2 zi1 cin4 ji5 wai4 ngo5 sung3 kuk1 kei4 beng2 bei2 keoi5 hai6 tung4 keoi5 si6 oi3, jyu1 si6 biu2 co3 cing4. The boy had misunderstood that I gave him cookies to show my love, so he had made a positive response which embarrassed him.