OCC
OCC is when someone can't stop clicking their pen like it's their last hope in life. It's annoying, obsessive, and usually happens in class when the teacher is asleep.
@mike: I have OCC, I click my pen so hard I broke it.
@lauren: Why is he clicking his pen? He’s not even listening to the teacher.
@james: I had to leave class because of my pen clicking. It was a war.