What pill i can take that can make my booty big without any side affects.?

No such pill: The size of your booty is dependent on genetics (what you were born with) coupled with what you eat and drink and how you move your body. If you come from a long line of flat bootied people, it will be harder to get the shape you desire. Exercises and sports that work the gluteal muscles are best to get a round bottom. Article here: http://www.Wikihow.Com/make-your-butt-bigger.