I have several irritating co-workers, but this is over the line.
The new girl we just hired plays music on her speakers all day- audible enough for everyone else to hear. That's not the worst part. The worst part is that she plays GLEE. All day long. I simply cannot abide it.
My other co-worker is fifty and obsessed with Edward from Twilight, and works him into every conversation she can.
Discuss annoying co-workers and annoying things they do.