Wikipedia:Nuke

An administrator using the Nuke tool to delete multiple pages at once
Screenshot of the Nuke extension, displaying a form to search for specific pages
Screenshot of the second screen of Nuke, listing individual pages to select or unselect to delete

Nuke, also known as Mass Delete, is a MediaWiki software extension, running on Wikipedia and other Wikimedia sites, that gives administrators the ability to delete recently created pages en masse. Administrators should be very careful when using this tool and make sure that all pages meet the requirements for deletion. Deletions using Nuke are subject to the same review as normal deletions and administrators can equally be held accountable for such deletions.

The tool is accessed at Special:Nuke. Use the form to search for specific recently created pages, then on the next screen select or unselect individual pages to delete. The deletion summary you enter will be applied to all deleted pages, so you may need to delete pages separately if you want to enter separate deletion summaries.

One of the uses for Nuke include mass-deleting pages created by banned or blocked users in violation of their ban or block, or pages created by sock puppets of blocked or banned users.

For full documentation, see mw:Extension:Nuke (on the MediaWiki site).