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Are you serious? 

A question asked in disbelief with an extremely sarcastic tone questioning someones actions or statement. It is a way to point out someones stupidity in the form of a question.

total disbelief or dissapointment in how someone did or said something.

Note: it is a very hard inflection that goes up to indicate the question
Hall: i definitely think that girl is hotter than jessica simpson.

Bush: that girl in our science class she's barely average.

Hall: I think she's amazingly gorgeous and makes simpson look ugly?

Bush: Are you serious?
Are you serious? by Randoni April 6, 2009

Are you serious? 

The verbal tic of dunderheads, morons and wannabe Californians (read: Seattle denizens and their ilk.) It is not intended as an actual question but rather is the reactionary knee-jerk of someone who does not think before opening the mouth.
Me: I just got this latte for uber cheap at the Starbucks on the corner.

Idiot I'm talking to: Are you serious?

Me: No, I'm just pulling your motherfucking leg. Of COURSE I'm serious!
Are you serious? by grammarcopkyle August 28, 2010

Are you serious? 

*Moving Walkway at ski resort stops*
Little kid in front of me: Are you serious? Come on! Are you serious?
Are you serious? by frabrizio March 7, 2017

Are you serious!?

An expression uttered subsequent to an unforeseen response; used in a joking sense; can carry a sarcastic tone; usually accompanied by a dramatic step back from the person; although it carries a question mark it doesn't require an answer.
Paul: "How'd ye get on in the match today?"
Shane: "We lost by 4 goals..."
Paul: "Are you serious!?"

Are you serious? 

*Moving Walkway at ski resort stops*
Little kid in front of me: Are you serious? Are you serious?
Are you serious? by frabrizio March 7, 2017

Are you serious? 

Easter egg in CoD MW. In the mission "clean house" you can find a baby. If you somehow shoot or uhhh harm the baby, the screen will go black with the words saying "children are non combatants" do this 3 times and the screen will now say "are you serious" and kicks you out of the mission
Me: shoots Bebe

Game: are you serious? *Kicks you out if the mission*
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Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
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"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
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Ajumma wait a moment
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Slop Grenade

When someone uses AI to generate a large document, slide deck, or piece of code/software and tosses it over the fence for you to deal with.
Chad: Hey Brent I sent you the new backend API change to review, it’s only 100 files changed.

Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
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After we broke up, he was floxi to me.
floxi by Dr. Geek May 13, 2009
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leafers by ss++ February 8, 2005
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