party pooper
noun [ C ] humorous uk/ˈpɑː.ti ˌpuː.pər/ us/ˈpɑːr.t̬i ˌpuː.pɚ/
煞风景的人，令人扫兴的人
someone who spoils other people's enjoyment by disapproving of or not taking part in a particular activity
Synonyms: killjoy spoilsport stick-in-the-mud wet blanket