An illness commonly caused from owning a Blackberry. Symptoms include having your Blackberry permanently attached to your hand and only contacting other people with a Blackberry, through BBM. Currently no known cure.
Alex: "Have you spoken to Grace recently?"
Vicky: "No, whenever I see her she's on her phone playing brickbreaker. Have you?"
Alex: "No, since she's had that new phone she only contacts other Blackberry owners. She has a major case of Blackberry Fever."