spoilsport

Definitions

A person who behaves in a way that spoils others' pleasure.

Someone who ruins the enjoyment of an activity or occasion for others.

Examples

I don't want to be a spoilsport, but I think we should head home before the storm hits.

He was such a spoilsport for complaining about the music at the party all night long.

Synonyms

killjoy party pooper wet blanket grouch crank sourpuss dampener

Antonyms

life of the party social butterfly fun seeker cheerleader enthusiast party animal joy spreader