People who are douche bags and have to ruin the fun of everything, kill the mood or shoot everything down.
Jamie: "Naw, I think I'm going to skip out on the concert, chillin' with friends and going camping."
Caitlin: "Jamie you're such a fuckin' kill joy!"
Caitlin: "Jamie you're such a fuckin' kill joy!"
by Caitlin July 15, 2005
Get the kill joymug. Peepz who kill the fun by wanting to do something else or calling it a day/night too early (like me).
"Ay I gotta go. I gottta see my friend so...just watch the rest of GLADIATOR without me, aightz?"
"You're such a KILL JOY!"
"You're such a KILL JOY!"
by Joshiro007 February 24, 2003
Get the KILL JOYmug. Girl: Yesh, finally Full Metal Alchemist. Oh how I've longed for you. *kisses television*
Mom: No FULL METAL ALCHEMIST. Japan is evil.
Girl: Geez Mom, you're such a kill-joy!
Girl: Yesh, No school because of snow!
Weather Man: Looks like school is back in session due to the sudden elevation of tempurature.
Girl: Geez Mr. Meteorologist Man Guy, you're such a kill-joy.
Mom: No FULL METAL ALCHEMIST. Japan is evil.
Girl: Geez Mom, you're such a kill-joy!
Girl: Yesh, No school because of snow!
Weather Man: Looks like school is back in session due to the sudden elevation of tempurature.
Girl: Geez Mr. Meteorologist Man Guy, you're such a kill-joy.
by Buttonsinfallcolours August 9, 2006
Get the kill-joymug. This is a nickname given to someone who is cynical, hates fun, and hates it when other people have fun. Originally derived from the stereotypical view of an angry grandmother who thinks her grandkids shouldn't be allowed to play and have fun.
by Jackie | Treehorn December 16, 2010
Get the Grandma Kill Joymug. A guy who, due to ego or low intelligence, refuses to acknowledge that he didn’t get understand the joke, so instead resorts to insisting that there was never a joke in the first place. He will often criticize the intelligence of the person telling the joke on the basis that they were serious.
“Make sure not to use satire around that guy! He’s Dunning-Kruger’s Kill-Joy, he’ll trap you in an argument you never actually made!”
by CountSnoww November 18, 2021
Get the Dunning-Kruger’s Kill-Joymug. by GarbJunky79 December 5, 2022
Get the Kill The Joymug. by slobski on my chopski April 9, 2022
Get the Joy killmug.