small talk
noun [ U ] uk/ˈsmɔːl ˌtɔːk/ us/ˈsmɑːl ˌtɑːk/
闲聊，寒暄
conversation about things that are not important, often between people who do not know each other well
I don't enjoy parties where I have to make small talk with complete strangers. 我不喜欢那种不得不和素不相识的人寒暄的聚会。
Synonym: chit-chat