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(noun) a digidown is a portmanteau of the phrase "digital download." It means that a thing is a digital asset available for download, such as an ebook, a game, or an app, etc.

(verb) to "digidown" is to download a thing through digital or computerized means.
The game has achieved two millions digidowns in the last four hours.
by Anenome March 23, 2011