To get a bigger butt in a week, you'll need to do exercises that target your glutes and eat a healthy diet that promotes muscle growth. Try doing squats, weighted lunges, donkey kicks, and glute bridges, which all target the muscles in your butt.
How do you get a Thicc bum?
If you want to be thick, you have to grow your glute and thigh muscles. These muscles are the gluteus maximus, quadriceps, and hamstrings. These muscles provide the thickness for the lower body and have to be well developed. So using resistance exercises like squats and deadlifts are a must if you want to get thick.