sǎo xìng de rén

be (a) party pooper

The term 'party pooper' is used to describe someone who dampens the fun or enjoyment of a social gathering, often due to their negative attitude or unwillingness to participate in the festivities. In Chinese, '扫兴的人' conveys the same idea, referring to a person who brings a negative vibe to celebrations or parties, making others feel less inclined to enjoy themselves.