here are example of butt exercise you can try this

. Squats View Full-Size Squats are one of the best exercises you can do for your hips, butt and thighs. There are many different types of squats, including the Chair Squat pictured here. Stand with feet hip-width apart and squat, keeping back straight, abs in and knees behind your toes. Let your butt lightly touch chair and squeeze butt to stand up. Repeat for 2-3 sets of 8-12 reps and add weights for more intensity. This gallery of squat images shows a wide variety of squats you can add to your current routine.