How can your butt get bigger less than 3 days?

Answer 1

Either have a substance injected into it by a trained medical doctor. Or, if you want to give the impression that you have gotten a bigger rear end (and don't show your bare rear end to anyone else), there are panties that you can wear that give the impression of a more rounded rear, such as there are Bras that give the impression of more developed breasts with padding. These panties have padding sewn in the back of them.