A dull and serious person with a limited sense of humour who always spoils jokes or light conversation by pointing out any flaw or exception
Person 1: "Damn chip packets only fill up halfway it's so unfair"
Person 2: "Yea mate they're half air what are we paying for?"
Person 3: "Actually, the slight inflation of the potato chip bag with nitrogen serves to prevent product spoilage or damage during transport. Furthermore, the mere volume of a chip bag should not give you an indication of how many chips are inside, but rather the mass of the product which is clearly labelled."
Person 1: "ok Reverend Killjoy"
by emcee-sdOG January 25, 2015
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Sometimes abbreviated as "Dr. Killjoy." Coined by N.E.R.D in the song "Anti Matter." A Doctor Killjoy is someone who makes it their business to ruin, take large dumps on, and/or "shoot up" your party or the party you are attending.
Person 1: Haha, I just pooped on your carpet, man!
Person 2: Why you doctor Killjoy, shooting up the party?
by Achilles015 June 6, 2009
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KillJoy Radio where the web will kick your ass!!. Can be found easily by going to the shoutcast site and searching for KillJoy. Also found onirc on undernet #killjoy.
Killjoy Radio, don't let the name fool ya!
by EvilMuse April 12, 2005
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Professor Killjoy fucked your mom and most likeley hates you! He also likes to hit bunnies with his car
by Muas March 15, 2003
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An exeptionally bad speller!
Notye above he spelled his own name "Muas"! LOL... I agree he is a dumbass.
by Maus March 15, 2003
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the punchline to an.. inappropriate, mini comic made by a frerardshipper (shipper of Gerard way and Frank Iero of my chemical romance).
standard fiatfv fan: hey look! It’s the stream for the medicine square garden music video
frerard shippers in the live chat: ARMS BACK KILLJOY
by semop May 20, 2020
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Synonymous with on fleek. It is abbreviated CTK.
That jersey is Crashfire T Killjoy (CTK), bro. Thanks for noticing. You are CTK, my dudes.
by Crashkiller January 6, 2020
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