The word "bronco" refers to a wild or half-tamed horse of the western United States, especially one that tends to buck, kicking out its rear legs, particularly when someone tries to ride it. It can be synonymous with a mustang or a wild horse. The term originated from the Spanish word [bronco](javascript:void(0)), meaning "rough" or "gruff," which Mexican usage also applies to horses that are not fully broken. In modern rodeo culture, broncos are often specially bred horses known for bucking in events like bareback and saddle bronc riding, symbolizing toughness and wild spirit.