An undeniably hideous piece of excrement, usually the product of a liberal, vegetarian resident of San Francisco. In recent years, the Japanese car company, Toyota, has been moulding this disgusting object into something that people can drive (like a car). How Toyota is able to do this has baffled scientists around the world. The most common driver of a prius is a person who created the original excrement (they're really in to recycling).
San Francisco has banned Happy Meals - why can't they ban people from driving priuses.