faux pas
noun [ C ] uk/ˌfəʊ ˈpɑː/ us/ˌfoʊ ˈpɑː/ faux pas
失言；失礼
words or behaviour that are a social mistake or not polite
I made some remark about his wife's family, and then realized I'd made a serious faux pas. 我谈论了几句他妻子的娘家，接着就意识到这很失礼。
Synonyms: gaffeslip