A person who is so infatuated with the iPhone game "words with friends" it interferes with their daily functioning.
Symptoms include lack of productivity at work (if they even have a job), accidents while driving (hoping to get lucky and create something more than a 5 letter word on a TW tile) and an overall shunning from society because everytime this person is out, their head is buried in their phone, trying to win at all 15 games the have running concurrently.
normal guy "damn bro, you see that chick at the bar eye fuckin us, she was bangin!!!"
words tweaker "hang on bro, Ive got a q and z and theres an open TL and TW tile, Im gonna straight up murder this fool right now!!! Oh yeah high 5"
normal guy "dont talk to me for 8 minutes"
words tweaker ":( ok"