The condition of being bored with facebook.
I haven't updated my Facebook profile in months. I have facebook fatigue.
You're exhausted because your real life can't keep up with your virtual one.
Friend: "I sent you a Facebook message and never heard back. What up?"
You: "Sorry, man. I have a serious case of Facebook Fatigue. The doc says I need hot tea, fresh air and to practice looking into the distance at least 3x a day."