A movie, book, or other form of entertainment that deals with both the future and origin of a series. Basically a prequel and a sequel combined.
The movie Terminator: Salvation is a sprequel because it deals with the future of John Connor and Skynet, but also deals with events before the orginal Terminator, like the creation of the T-800 Model 101 Terminator.
by imnotacritic May 29, 2009