Get on top of somebody Definition 1 of 3Pro Tip 1/3Challenge Mastery Used when emphasizing the successful management of something difficult. She really needs to get on top of her finances to avoid debt. Pro Tip 2/3Stress & Responsibility Implies that someone is overwhelmed and must regain control. After the holidays, I have to get on top of my diet again. Pro Tip 3/3Proactiveness Implied Suggests taking initiative to deal with something before it becomes unmanageable. You should get on top of your project now, rather than waiting.