killjoy
/ˈkɪldʒɔɪ
/noun
A person who deliberately spoils the enjoyment of others: a few killjoys try to reform the seasonal activities...
- It's meant to be a fun for all occasion to take our mind off the advent of Winter, so let's have no killjoys of any description spoiling it for others.
- And, that great corrupter, the fear that if you don't laugh you will be seen as a prig and a killjoy.
- The builders of the Bay Colony were redefined as bigots, prudes, and killjoys.
Synonyms
spoilsport, moaner, complainer, mope, prophet of doom, Cassandra, Jeremiah, death's head at a feast;
puritan, prig, prude;
Australian/New Zealand wowser
informal wet blanket, party pooper, misery, dog in the manger