Name ambush1 describes the situation when an acquaintance you haven't seen for a long time comes across and greets you by name but you cannot remember their name at that moment. You know this is embarrassing, but you can do nothing about it.
Name ambush指你偶然遇见一位很长时间没见、本来也不太熟的朋友,他们叫着你的名字跟你打招呼,可是你一时间却想不起他们的名字。大家可以戏虐地称之为名字伏击。你了解如此挺尴尬的,可是你也无法。