Guildfording

Unintentionally setting a release date for a game or piece of entertainment and then not being able to deliver on that date.

Common in developers in Guildford, England

Person 1: Hello games said No Mans Sky will come out in June!
Person 2: Nah they're just guildfording

Person 1: Hey Media Molecule said Dreams Beta will be 2016!
Person 2: Beta 2016? Nope thats just more guildfording.