Top Definition
When you're browsing facebook and see a status update and then 15 seconds later your twitter application announces that you have a new tweet which is of course your friend's facebook update that is tied into twitter.
I saw Jason's facebook status update and then a minute later twitux told me he had updated. Deja tweet.
by Blunt Roller May 18, 2009
The overwhelming sensation of déjá vu that occurs shortly after posting a message or status update in a social media; the feeling that you've tweeted this before.
"I'm getting serious déjá tweet about that Twitter message I just posted..."
"Yeah, dude, you posted the exact same thing two weeks ago."

"Hey, are you feeling déjá tweet about your Tuesday status updates?"
"Yeah, but every Tuesday's the same for me."
by zims October 07, 2012
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