To hijack someone else's iPod (esp. w/car interface, while owner is driving) and change their playlist of choice to one you prefer--without their consent, knowing they are unable to interfere. Can imply a criticism of the owner's taste in music.
> Dude--don't be podjacking me! I just put that playlist together! My car, my tunes...
> Ugh--this music sucks. I'm podjacking you.