spoilsport

American  

[spoil-spawrt, -spohrt] / ˈspɔɪlˌspɔrt, -ˌspoʊrt /

noun

1. a person whose selfish or unsportsmanlike attitudes or actions spoil the pleasure of others, as in a game or social gathering.

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spoilsport British  

/ ˈspɔɪlˌspɔːt /

noun

1. informal a person who spoils the pleasure of other people by his actions or attitudes

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Etymology

Origin of spoilsport

First recorded in 1815–25; from phrase spoil the sport

Example Sentences

For days, northern California newspapers kicked around fierce, spoilsport claims.

From Seattle Times • Feb. 8, 2024

Never mind the spoilsport who defines college as “those magical seven years between high school and your first warehouse job.”

From Washington Post • Apr. 19, 2023

But rising interest rates and fears of a recession may play spoilsport in an industry where most vehicle purchases are financed with loans, analysts say.

From Reuters • Apr. 3, 2023

The couple had planned a lavish wedding in April, but then the pandemic played spoilsport.

From BBC • Oct. 31, 2020

He deserved it for being such a spoilsport.

From "The Old Willis Place" by Mary Downing Hahn