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when someone gets extremely angry, and or violent with a person or persons, and proceeds to either verbally or physically assault them, and even sometimes both. similar to Batman in the The Dark Knight.
Brandon- Man, did you see that lady in the store yell, and clobber her son when he would stop begging for candy?

Jeremy- Yeah, she went straight dark knight on him.
by KingBRM January 03, 2010
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