sour grapes
In a famous fable by Aesop, a fox declared that he didn’t care that hecould not reach an attractive bunch of grapes because he imagined theywere probably sour anyway. You express sour grapes when you put downsomething you can’t get: “winning the lottery is just a big headacheanyway.” The phrase is misused in all sorts of ways by people who don’tknow the original story and imagine it means something more general like"bitterness” or “resentment."
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