A bust/failure, the term is used when someone is trying to play up something, party, show, activity, etc. You use it when responding to the invitation because you know it will be a bust.
Q: Hey dude, you going to the partai that Guber invited you to, he said there will be so many girls, booze, and music?
A: Nah, sounds like a bogey, did you not hear about his last partai?