A chauffeur-driven auto is commonly referred to as a limo, which is a four-letter word. A chauffeur-driven auto is a vehicle that is driven by a professional driver, usually hired for special occasions such as weddings, proms, or other events. The driver is typically dressed in a uniform and is responsible for the safety of the passengers. The vehicle is usually luxurious and may include amenities such as a bar, television, and sound system.