Vibration Hallucination Syndrome. When you text so much that you feel your phone vibrate when it hasn't.
-Guy 1 is constantly checking his phone-
Guy 2: "Dude, no one's texted you the last 10 times you looked."
Guy 1: "I know, but I felt it vibrate like 50 times."
Guy 2: "You got that V.H.S."