Do yourself up Definition 1 of 2Pro Tip 1/3Special Occasions Used when preparing for events where appearance matters more than usual. He is going to do himself up for the award ceremony. Pro Tip 2/3Impression Matters Suggests an attempt to make a good impression through one's appearance. She did herself up before meeting her fiance's parents. Pro Tip 3/3Detailed Preparation Emphasizes attention to detail in dressing or grooming. For her first date, she did herself up with great care.