tweader
Tweader is a wordplay with tweet and read on Twitter.
Tweader is a person who mainly read tweets from others and rarely tweet themselves.
Can also be used as a verb - tweading (reading tweets).
- Do you have Twitter?
- Yes, but I´m just a tweader. I don´t tweet that much myself you know.

- Are you tweeting with someone at the moment?
- No, I´m just tweading.