What is meant by the term self-fulfilling prophecy?

What do you call a person who keeps secrets? What does it mean when somebody stole your earrings in your dreams? What does it mean to have a dream about killing zombies? How can a werewolf who was a human become human again? What happened in The Vampire Diaries episode 10? What does it mean when you dream cockroaches? Is it bad luck to read tarot cards under a certain age? How do you do the illusion of making someone disappear? What makes you have strange dreams? Is the lost portal of Atlantis real? What is the size of crop circles? How do you find the obituary for an obscure 1960's musician named Bard Dupont? Who are the real charmed witchs? Who betrayed the order at the begging of Deathly Hallows? What is the difference between a superstition and an omen? Is there a spell that will enchant a necklace to turn you into a mermaid when you put it on and change you back into a human when you take it off? How do Scorpio parents discipline their children? How would you describe obsidian? How does gas exchange occurs within? How do you find out if a building is haunted?