To be revved up about something is to be psyched, excited, and ready for said experience. To be revved up in general means that one is prepared to go up to the world and deal with it, ready to go up to the world and take it out. It means that one is going to make the world your thrall, your puppet, your marionette. It means that the world is going to be in the palm of your hand, everything therein ripe for the taking. "Hey you!" you say to the world. "Suck it down!" (It is only upon rare occasion that the world actually listens)