noun
killjoy
KIHL-joy
noun
1
Someone who spoils other people's fun or enjoyment.
"Don't be such a killjoy — let them have their fun."
How to Use Killjoy
Learner’s notesIn plain EnglishA person who ruins the mood or stops others from enjoying themselves.
Easily confused with
Common pairings
such a killjoy
don't be a killjoy
Word Forms
killjoys plural
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Etymology
A straightforward compound of "kill" + "joy," first recorded in the late 18th century.