Top definition
A frustratingly futile task, especially one that keeps being attempted. Related to the Greek myth of Sisyphus, who is condemned to roll a huge bolder up a hill, only to have it roll down again, just before it gets to the top.
“We want to thank all of the activists that stood with us all these years. They stood by our side during the long sisyphic struggle, and all our supporters, in Israel and throughout the world,” he added.
by AarJay57 December 30, 2011
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