Don't know? Don't care? What the hell is it? You should care. Libor is the global rate out of London that many interest rates are pegged to. There's been some teeth grinding, perhaps even a kerfuffle in London and the Big Apple over whether the rate has been set correctly. The punch line is that you're okay, it seems as though it turned out in the consumer's favor. At least THIS time. BUT, what we love is that Businessweek took the time to explain Libor - a publication after our own heart. Check out their quick explanation here and never feel confused by your loan terms again.