A "Nicker" is a term used to describe a soft, low sound made by horses. This sound is often a sign of contentment or a way for horses to communicate with each other and their handlers. It can occur when a horse is relaxed, greeting another horse, or seeking attention from humans. In addition to its vocalization, the term "Nicker" can also refer to a specific breed of horse known for its gentle temperament and strong build. These horses are often used in various equestrian activities, including riding and working on farms, making them popular among horse enthusiasts.