twatcher
A twatcher is someone who just reads other peoples twitter feeds and doesn't contribute anything of their own to the conversation--a twitter voyeur. A twatcher may or may not have a twitter account of their own.
Sarah: Did you see that textsfromlastnight Kyle tweeted last night. Haha, two guys. Becky: You're not on twitter, how did you see that? Sarah: Umm, it's called an RSS feed. Becky: Girl, you are such a twatcher! Sarah: I don't like using at signs and you know that!
By topherjaynes