For one good bodybuilder, you shouldn’t ignore your buttock, and the strong and solid butt will be one great constituent of the whole body shape. By the way, the Gluteus has great potential among all the muscles. Once its strength would succeed to get considerable progress, the whole athletic capability would increase. Generally speaking, there are no particular dumbbell exercises for buttock, but almost all the compound dumbbell exercises would exercise the buttock, especially those for leg. Because of the compact connection between buttock and biceps femoris.
Now I will introduce you two kinds of dumbbell exercise which could build your butt.
The first one is the king of compound dumbbell exercises, which is dead lift. The dead lift is the most general strength workout and test. Although the dead lift athletes have never thought about how to build their butt, you also find out that their buttock muscle are very strong. If you want to build buttock through dead lift, it is suggested that you should choose the bending-knees dead lift, which could transfer most weight to the biceps femoris.
The second one is the squat which includes general squat and reverse lunge.
Both of them, especially reverse lunge have the wonderful effect in building buttock. When you want to build buttock through reverse lunge， it is suggested that you should make the distance between two feet longer, which could shrink and activate the buttock better.