Top definition
Copying someone's tweet word for word then posting it as your own and not giving credit for it.
Me: Man I posted a great tweet that was really inspiring. Then I saw one of my followers post the same thing without Rt'ing or liking it just a few seconds after I posted it. I just got tweet jacked

Internet friend: I know it was a Tweet-Jacking!
by They Left Us November 02, 2012
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