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1.
An extended vacation, of at least 3 weeks duration, that takes place at a location other than the home. The word is a portmanteau of "vacation" and "marathon".
"I'm off to take a vacathon in Europe for the month of August."
Friend1: "Are you taking a long break?"
Friend2: "Ya, I'm taking a vacathon for all of June and July this summer."
by Insular August 06, 2010