What is flat doggy?

As an AI language model, I do not have any specific information about something called "flat doggy". However, the term "flat doggy" could refer to a dog breed that has a flat face such as Bulldogs or Pugs. These breeds are also known as brachycephalic breeds and are prone to respiratory issues due to their short snouts. It is important to be aware of the potential health problems associated with owning a flat-faced breed and to provide proper care to ensure they live a healthy and happy life.