Someone who has to use his/her smartphone every single minute.
"It's the 7th snapchat I get from Yolanda today, she's such an iDict."
"When Oliver's iPhone is out of battery, he becomes all stressed and weird, he's a real iDict."
Person 2: "yeah, he was sitting in Starbucks writing on his iPad and listening to his iPod whilst talking on his iPhone"
Person 1: "eugh, that guy is such an iDict"