be a killjoy
To make other people less happy, excited, or enthusiastic about some event or thing. My husband can be a real killjoy sometimes, always shooting down the fun things I suggest for our family vacations. A: "We really should be studying for our exams instead of throwing a party, you know." B: "Oh, Marcie, don't be a killjoy." Don't invite Nicole to the party. She's such a killjoy that she'll probably just sit around complaining the whole time.
killjoy
Someone who makes other people less happy, excited, or enthusiastic about some event or thing. A: "We really should be studying for our exams instead of throwing a party, you know." B: "Oh, Marcie, you're such a killjoy." My husband can be a real killjoy sometimes, always shooting down the fun things I suggest for our family vacations.
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