Nuke
From PHWiki
A nuke is a release in the Scene that for some reason doesn't hold up to the rules set by the scene. Most commonly they are bad dumps, ie the data is corrupt or innacurate somehow. This would be a typical site-wide nuke.
Each separate site in the scene can also have their own specific set of standards for nuking.
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Nuke standards on PocketHeaven.com
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