他在晚宴上把老板的名字叫错了，真是尴尬的社交失误。

Calling the boss by the wrong name at the dinner party was a serious ___gaffe.

他在晚宴上说错来宾的职位，闹了个尴尬的笑话。

He made a ___gaffe at the dinner party by misstating the guest's job title.