Jossverse
Term coined by fans to describe the alternate universes created by Joss Whedon used in his TV shows Buffy the Vampire Slayer, Angel and Firefly. NOTE: Buffy and Angel have their own seperate universe known as the Buffyverse.
You know, the Jossverse is an interesting place: demons and vamps on one side, space traveers on the other. How one man came up with all that is beyond me.