killjoy 

A person who deprives everyone of their joy in the moment, sometimes resulting in silence.

When Bob walked in, and then everybody's expression changed and everyone stopped talking, Bob is a real killjoy

killjoy by Chieftawsmcool January 18, 2011

killjoy 

someone who kills joy.

isn't that obvious.

killjoy by calV April 30, 2005

Killjoy 

One who kills fun and/ or joy and happiness.

Also see party pooper

Dude!! I was about to get laid, but then my dad walked in and freaked out. He's such a killjoy.

Killjoy by Senor Anon May 6, 2008

killjoy 

somebody who ruins fun for other people

I wont bother making a christmas turkey next year

Bloody hell! Stop being a bloody Killjoy

killjoy by mickmickman July 3, 2008

Killjoy 

People who consider themselves fans of My Chemical Romance. It's a relatively new term, emerging after the release of their fourth album, Dander Days: True lives of the fabulous Killjoys. Killjoys are often rebellious, and express their rebellion through music, art, or literature. As such, they're somewhat well-know for being artistically gifted in those and other areas. Sometimes, a killjoy will give him/herself a "killjoy name," which is usually an exciting, unique adjective followed by an equally exotic noun.

Killjoys, make some noise!

Killjoy by Sykoh July 8, 2011

Killjoy 

The True Lives Of Fabulous Killjoys. My Chemical Romance is legendary.

In the true lives of fabulous Killjoys.

Killjoy by Drizella Kokane June 26, 2018

Killjoy 

Rebels of BLI (Better Living Inc.) in California 2019 from My Chem 's album Danger Days: The True Lives Of The Fabulous Killjoys.

It's time to do it now and do it loud. Killjoys, make some noise!

Killjoy by KILLJOYSmakeSOMEnoise April 17, 2011