any of various injuries accrued in a mosh pit where you and your nerd buddies are playing virtual instruments on their blackberries in lieu of a band.
Leon "Dudes, I just went to Mike's sweet party and there were a bunch of nerds from the IT department there playing the Star Wars Theme Song on their Blackberries, and I was totally rocking out and hit my head on Mike's pocket protector and it bled everywhere.
Other dudes, much more cool than Leon "Dang, man, sounds like a pretty bad IT band injury."