The anxiety that builds as you wait for your friends to take their turn playing Words with Friends. Often causes a momentary feeling of abandonment and a realization that that maybe you do not in fact have any actual friends.
Tom - "Dude, what is up with the attitude?"
Matt - "None of my friends are playing Words with Friends and it's been like 5 minutes since I sent my last move."
Tom - "Wow, my WWF Anxiety doesn't usually hit till at least the 15 minute mark."