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8.
someone who kills joy.
isn't that obvious.
by calV April 30, 2005
125 55
 
1.
Someone who wants to ruin someone elses fun.
The killjoy tattled to the apartment manager, after he saw Mike enter his apartment with a gorgeous woman at midnight.
by Ronald Clifford Buckman August 09, 2003
649 188
 
2.
a person who takes the fun out of things for other people
You killjoys need to loosen up. I want you to have some fun this time.
by Light Joker May 17, 2005
369 91
 
3.
Reference to "Danger Days: The True Lives of the Fabulous Killjoys", the (as yet to be released) album by My Chemical Romance.

Outsider fighting against social/corporate suffocation.

Non-conformist.

Rebel.
"Killjoys, make some noise!"

Search "Na Na Na trailer" on YouTube for the best definition/example.
by Elph7777 October 01, 2010
493 247
 
4.
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.
by Senor Anon May 06, 2008
253 86
 
5.
1)someone who doesn't want others to enjoy something because it is in his/her taste.

2) someone who doesn't like happiness, laughter or fun especially when the person is not involved/invited and comes in to ruin it.
1) James is always coming in and cutting off the game because he sucks at it, he is such a killjoy.

2) Whenever we are laughing, joking or playing a fun game, it bugs jim's father so much that he runs downstairs and ruins it for us. tsk, tsk...such a killjoy.
by COOLMASTER X October 15, 2009
154 39
 
6.
somebody who ruins fun for other people
I wont bother making a christmas turkey next year

Bloody hell! Stop being a bloody Killjoy
by mickmickman July 10, 2008
144 56
 
7.
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
by Chieftawsmcool January 17, 2011
129 43