Here is a bicep workout to severely kick your ass and make you cry for your mommy.
Hammer curls-4 sets of 8-10 with as heavy a weight as you can do with good form. I use 55-60lbs. It should be really difficult.
"Crushers"
Get a 25, 30, and 35 pound sets of dumbbells. This is basically a drop set. Lift the 35 8-10 times(or comparable weight for your strength), drop it and immediately pick up 30s, then with 25s. 2 sets will make your arms explode. 3-4 is even harder. Eventually move all the weights up to 40, 35, 30. Finish this workout off with some preacher or cable curls and I promise your arms will be sore, and more importantly will be shocked into growth.
It takes a different kind of determination to get through workouts like this but do them properly and they will reward you with Strength AND Size. I usually do triceps with them also, in a similar fashion. PM if interested.