I can tell you that you can absolutely make your butt bigger. As a guy I have done it myself.
How to Get a Bigger Booty
You need to build more muscle in your gluts. So to build muscle you need to eat more protein. You could do it with Chicken and Meat. But be careful with that because that might increase your tummy weight. So I would recommend you have one protein shake before a work out or eat add more yogurt and nuts to your diet.
You can increase the size of your booty WITHOUT adding protein. This is especially the case if you think you are overweight. So if you feel you are too chubby and you want to convert your body weight into booty muscle..I suggest stick to a low calorie diet and just jump to what I have to say below.
Pay attention because this is very important. You need to do squats. Preferably doing so with more "resistance". This means that when you do squats you need to keep pushing as much weight as possible and bend those knees. After about a month of doing squats and adding weights to your reps I promise you that you will see results. I would start by doing 10 reps of 10 pounds, then 25 pounds, then 50 pounds, then 75 pounds, then 100 pounds and so on. Doing squats with weights is the most powerful way to get results that you will actually start to notice in the mirror.
Stair Master Machine
The squats will make that booty big! But the stair master machine will smooth out that form and make the shape sexy. It evens everything out for the look you will be proud of.
Don't have a machine? Don't have weights? No problem! Just go to a park or a large field and start doing lunges as far as you can. This will firm up that booty of yours as well!