Definition of spoilsport in English:

spoilsport

Line breaks: spoil|sport
Pronunciation: /ˈspɔɪlspɔːt
 
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noun

A person who behaves in a way that spoils others' pleasure, especially by not joining in an activity: ‘Don’t be a spoilsport, Sidney.’
More example sentences
  • Such spoilsports, however, could not prevent cultural exchanges.
  • Only spoilsports warned that disaster loomed, and they didn't get nearly as much air time as the boosters.
  • The law has the age of drinking set at 18 for good reasons, not just to be spoilsports.
Synonyms
Australian/New Zealand informal wowser

Definition of spoilsport in: