F.P.S.I.H
F. P. S. I. H is when your head gets so sore from playing too much first-person shooter games that you want to quit and cry in a corner.
I got F. P. S. I. H after playing for 6 hours straight. I cried like a baby.
My friend had F. P. S. I. H and started talking to his character like it was a therapist.
After that boss fight, I had F. P. S. I. H and my head felt like it was being squeezed by a giant.