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Your credibility on your tweets.
"Al Gore won Florida! He is the next president of the US!"

"False @Gorelover, you loose Tweetcred"
by @klippy6 November 30, 2009
Similar to street cred, this is the level of respect you command in the micro-blogosphere due to your witty, cool or ingenious tweets.
Damn, @garyvee gots mad tweet cred!
by Mike Vihuela March 06, 2009