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"You Killed It" means the joke isn't funny.
gabby- "yo mama is so dumb when she went to the airport it said "Airport Left" so she turned around and went back home.
billy-"and then she goes back?"
gabby- "You Killed It!"
by Annonymous_nigga August 03, 2005
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Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
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2
When that one idiot ruins a joke by overusing it to the point of it not being funny anymore.
"Did you wanna come in my office or yours?

"Haha, that's what she said!"

"Naw, dude. You killed it."
by SeDorka July 17, 2011
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3
"You killed it" is what one says to the other who puts an end to a funny joke.

People will be laughing at a certain joke, then someone will try to enhance the humour by adding a witty comment or something(see list below) to get more laughs albeit failing miserably and making the joke not funny anymore.

The most common ways to kill a joke are to tell the joke so often to the point it isn't funny anymore, or to attempt at enhancing the humour by displaying a sarcastic/witty comment, taking the joke literally or stating the obvious.
1. "Why'd the chicken cross the road?"

"Dude, cut it out! You killed it a long time ago, you told the joke so many times!"

2. "why'd the chicken cross the road?"

"to get to the other side"

"hahahahahahahhaah!"

"maybe the chicken needed to go to the bank!"

"(sigh), you killed it."

3. "What's the difference between a pizza and a Jew?"

"A pizza doesn't scream when you put it in an oven!!!"

"Well why would anyone wanna put a Jew in an oven? They're humans too!"

"It's a joke dumbass, you killed it..."

4. "How do you get 4 fags to fit on one bar stool?"

"Turn it upside down."

"HAHAHAHHAHA!!!!! That's a good one eh?"

"Wow, sounds like they must've enjoyed it, huh?"

"You killed it again!"
by Your Username Here October 14, 2009
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4
TJ Lavins favorite saying for when somebody wins a challenge
Alright Jonny congats you killed it you can go rejoin the group

Eric you did well but you lost so you have 20 minutes to get your stuff
by Eryone knows its butters! November 27, 2019
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