Definition:
Buzzkill is a slang term used to describe someone or something that ruins an enjoyable or exciting experience or situation.
Use case:
You can use the term "buzzkill" when someone or something spoils the fun or excitement of a situation. For example, if you and your friends are having a great time at a party, but one person starts complaining or arguing, they could be referred to as a "buzzkill" because they are bringing down the mood.
• Going to the dentist is such a buzzkill, but it's necessary for good oral health.
• I'm sorry to be a buzzkill, but I have to study for my exam tomorrow.
• The party was getting really fun until the cops showed up and buzzkilled it.
• The rain was a total buzzkill for our beach day plans.
• Don't be a buzzkill, let's go out and have some fun tonight!
• My boss is such a buzzkill, always putting a damper on our creative ideas.