Butt Exercises??

Here is what my weight-lifting-guru brother taught me:
Get a 2X4 (or an object about that height), and stand with your heels on the board and your toes on the floor. Hold a dumbbell in each hand (2 lbs or 5 lbs or whatever you're comfortable with), and squat and stand up. You don't do anything with the dumbbells other than just hold onto them at your side. Do three sets of ten every other day.

I took my brother's advice, and his plan worked really well. And then I just got to lazy to keep up with it.