The process of undoing a completely clusterfucked build process. Used in both in Agile and Waterfall methods. Usually this process happens right after a Death March, but can also happen as part of Short Timer syndrome.
A developer haphazardly converts 190 projects to Visual Studio 2010, .Net 4, and the newest version of all control packages, and then leaves. After the fallout is cleaned up, a dejackification process must happen before anyone can actually do any work again.