Reminiscent of a speed freak (aka: the tweeker) it is one who's OCD about memorializing everything they do at any given moment on Twitter; that is, one who tweets incessantly, constantly and/or needlessly.
Sam: Hey, babe! It's me. Just callin' to see what you're doing tonight. Wanna go out?
Candy: Wait a sec...(tweets this call)...check me out on Twitter. I just twatted you (giggles).
Sam: Uhhh...I'm driving right now...I'm not at a computer.
Candy: Oh that's ok. Check it out when you get home. Seeya (CLICK).
Sam: What the f...?! I gotta dump that Goddamn, tweetfreak!