spoilsport
🇺🇸
/ˈspɔɪlspɔːrt/
🇬🇧
/ˈspɔɪlspɔːt/
A person who prevents others from enjoying themselves.
You're such a spoilsport for not wanting to play games with us.
당신은 우리와 게임을 하고 싶어하지 않아서 정말 재미를 망치는 사람이에요.