"Dude" is a casual term often used to refer to a person, typically a male, but it can also be used in a gender-neutral way. The word originated in the late 19th century in the United States and was initially used to describe a man who was overly concerned with his appearance. Over time, its meaning evolved to become a friendly or informal way to address someone. In popular culture, "dude" has been popularized by movies and television shows, such as Bill & Ted's Excellent Adventure and Dude, Where's My Car?. It is commonly used among friends and in relaxed settings, conveying a sense of camaraderie and informality.