Definition of spoilsport noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈspɔɪlspɔːt//
; NAmE NAmE//ˈspɔɪlspɔːrt//
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a person who spoils other people’s enjoyment, for example by not taking part in an activity or by trying to stop other people from doing it Don't be such a spoilsport!
See the Oxford Advanced American Dictionary entry: spoilsport