I used to know the name of it. When you stand up and curl the the bar back and fourth. I believe it's a hard exercise to do because you really have to try to keep your body balanced as possible so you don't do too much swaying. I do this exercise with my bulldog bar(Not sure if its called that anymore).Here's a picture of it.
exactly what u just said standing skull crushers the bar is called a EZ BAR cause of the bend be carefull this exercise can strain the elbows if its very heavy.. i had to stop
