Hyde Park Buggy is a term used to describe a PRAM, which is a type of baby carriage. It is a four-wheeled vehicle designed to transport an infant or toddler and is often pushed by a parent or guardian. The term Hyde Park Buggy originated in the 19th century when prams were first used in London's Hyde Park. The prams were popular among the wealthy and fashionable, and the term has since been used to refer to any type of baby carriage.