Sharpie eyebrows are brows that have been shaved off completely and then drawn in with a marker. They received the name because they often look as if a Sharpie brand marker was used to color a thin line on the face.
Most beauty experts do not recommend attempting Sharpie eyebrows. It is a very bold, severe look that creates extremely thin eyebrow lines. If a natural look is desired that mimics real eyebrows more closely, then a brow pencil can be used. Choose a color that matches, and then apply the pencil with short, light strokes in order to imitate real eyebrow hair.