What someone says when they have done something for the purpose of maliciously disrupting another person(s) motive, intentions, life, job, etc, and the victim asks that someone why they did it.
NEWS AGENCY: We have hired a new science editor.

Bob: Welcome to the team, Freeman. We need you to start by editing this paper on climate change. Exxon is one of our top sponsors and they have told you to remove the bit on 80% efficiency solar panels and make it look like oil does not harm the environment.

Freeman: Ok.

3 days later:

Bob: FREEMAN! You included the bit on 80% efficiency solar panels, you made the bit on oil seem even more against the environment, and then you proved that Exxon bribes us! WHY?!

Freeman: Why? FUCK YOU, that's why.
by The Lion's Word July 20, 2011
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An expression Homer Simpson of "The Simpson's" uses right before he begins strangling his son Bart. A sign of extreme anger, often in response to an insult.
Bart: "If you had a nickle for every time you scratched your butt, we'd be on easy street."
Homer: "Why you little..."
Bart: (choking sounds)

Homer hits himself in the eye with the sharp part of a hammer. Bart starts hysterically laughing.

Homer: "Why you little..."
Bart: (choking sounds)
Homer: I'll teach you to laugh...at...something...that's...FUNNY!!!
by ynnoj123 January 1, 2012
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when you ackin up and someone tells you to stop, you accues them of being gay
don't you yell at my muh fucckin babies. pussy nigga. that's why you gay
by niggas like you gettin fucked September 9, 2017
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The questioning of why someone did something. (WYDT)
Ex 1:
Gary: Oh my god... what have I done!?
Santi: why you did that
by sgtdallas July 11, 2008
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Something you say to confuse your friends, due to it lacking an adjective
Me: Dave, why you so?
Dave: So what?
Me: Why you so?
(Dave breaks down into tears because he's so damn confused)
by Fus February 1, 2013
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Said in a higher pitched Mexican accent, used to mock somebody when they get upset over menial matters. Originally derived from getting chilli sauce in ones eye, giving the appearance of crying over nothing.

Usually replied to with "I'm not, I've just... (Insert why you're "crying" here)
"Terrell, why you crying?" "I'm not, I've just got chilli in my eye".
by Mobbin' June 22, 2014
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