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.

This is used when mocking someone

When you are really serious about something.

It’s like saying I’m serious

it’s basically like “word to my crocs” but with sketchers

I agree.

used to describe an irrelevant statement becoming relevant