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1.
Turning off someone's music that is playing loud enough for everyone at work to hear, followed by turning yours on. Therefore "tunejacking" the music that you and other people are listening to, from one person's computer or radio to yours.
"Dude, as soon as Nick went to lunch, and left his death-metal music playing, I tunejacked him! ha!"
by TanayB June 19, 2007
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