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2.
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.
by KaziKluBey October 02, 2011
 
1.
Noun - a person or individual who joins Twitter but never posts anything yet continues to check twitter every 5 mins
Friend A "You on Twitter?"
Friend B "yeah but I'm more of a tweader"
by Makem16 September 04, 2013