If you're looking to lose side fat fast, there are a few things you can do. First, watch your diet. Make sure you're eating healthy foods and avoiding processed, sugary foods. Second, get regular exercise. A combination of cardio and strength training will help you burn calories and tone your muscles. Finally, focus on reducing stress in your life. Stress can lead to weight gain, so finding ways to relax and destress will help you slim down all over.