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To cause damage by implementing a promising-sounding but flawed or unproven idea.
I wish I'd hired a professional roofer instead of trying to do it myself, but I've hopenchanged my roof so bad it now leaks like a

or

The V.P.'s plan to cut costs by laying off all but one of our customer service reps has hopenchanged our customer base to the tune of a 45% drop in sales in just one quarter.
by Whirledweary August 04, 2009
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2
What you should feel in the new era of Obama. Alternatively, it can be used to replace most any noun.
Wow, I'm so full of Hopenchange!
Man, I'm almost out of gas, guess I'll just fill 'er up with some Hopenchange
by AlbanianCocksman January 21, 2009
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