The area, usually on an IRC channel, where all scene release groups post their warez releases. Releases are sorted in categories in the PRE database, such as XviD, TV, XXX, Games, etc. Certain releases are nuked and unnuked. Only certain people who make bootlegs are allowed to see the PRE database. PRE databases are usually linked through a network of bots on different IRC networks.
MovieDownloader: Was that movie released in a DVDRip yet?
Operator: Check the predb!