Raver's Elbow
A repetitive strain injury of the elbow joint, cause by excessive "fist pumping". This injury is most likely to occur at Rave's or EDM festivals. While painful, this ailment is not nearly as severe as it's cousin "Raver's Wrist" which could affect ones ability to hold glow sticks or give light shows.
Bro, I got such bad Raver's Elbow at EDC last weekend, that I couldn't even fist pump to Avicii's set.