Short for pocket precognition: (1) n. the experience of pulling your phone out of your pocket thinking that you felt it vibrate, finding that it did not, and putting it back in your pocket only to feel it vibrate for real; (2) n. a person having the gift of pocket precognition.
Martin pulled his iPhone from his pants pocket when he felt it vibrate. But when he looked at it, he had no new notifications. He put his iPhone back in his pocket, and it immediately vibrated with a new Facebook notification.
That's some freaky pocket precog.