Sideburns are patches of facial hair that grow along the sides of a person's face, typically extending from the hairline down to the jawline. They can vary in style, thickness, and length, and are often associated with different fashion trends. Famous figures like Elvis Presley and James Dean popularized various sideburn styles, making them a recognizable part of men's grooming. The term "sideburns" comes from Ambrose Burnside, a Civil War general known for his distinctive facial hair. Sideburns can be worn alone or combined with other facial hair styles, such as mustaches or beards, allowing for personal expression and individuality in grooming choices.