A statement made after someone has committed an act of such great stupidity and foolishness that the questioner is too gob-smacked to fully comprehend why someone would do such a thing. Akin to the terms wat, wut, and what, but used to infer complete and utter shock/anger.
(After Jim shot Tim's character in a video game for no apparent reason)

Tim: Why would you...huh?!
by papafrost December 17, 2010
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