a person who hasn't the interest or vitality to participate actively in a social party and whose mood, attitude, or personality lessens others' enjoyment; killjoy.
(informal) a person whose behaviour or personality spoils other people's enjoyment
Word Origin
C20: originally US
Slang definitions & phrases for party pooper
party pooper
noun phrase
A morose, pessimistic person; killjoy, wet blanket: No one can call Mr Bulganin and Mr Kruschchev party poopers/ What a party poop you are today, Sally(1951+)