killjoy

Society loves nothing more than to give oxygen to the killjoys, allowing them to continue their pattern of arson, burning down all the things that people love.

What kind of abominable killjoy would be against loving presents and cookies?

Not to be a killjoy fact-checker, but this does seem like an important detail to get right.

I dont want to be shown up as a fraid cat and a killjoy, cried Jessie.

However, I did my utmost to bear a cheerful and contented mien, for killjoy is but a poor friend.

I'm not going to offer it to you again, nor anything else either, you great hulking killjoy.

A man who was a well known killjoy was described as a great athlete.

He knows that I scorn his, and he comes to insinuate himself into mine, the horrible killjoy!