1. To take over by force
2. To replace someone's home page to some crappy search engine that they would never have used and still won't even if they can't get it off their computer.
Home Search Assistant totally fucking hi-jacked me! But I still h4x0red its ass.
by TryANewTaco January 18, 2005
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Word used to identify message board thread take overs.
The original post was about "holes" but some "hi-jacker" turned it into a peta discussion.
by raptorman July 27, 2004
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when you know someone is in mid-poop and you bust in the bathroom and push them off the toilet, then steal their toilet paper.
Go Hi-jack the toilet to John
by Will Wraith October 16, 2008
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Working out in the gym, exercising in the park, cross-fit, basically any form of exertion intended for fitness towards making their body more appealing.
Where is Dan?

Oh, he's downstairs in the gym jacking his rig.
by BulawayoBob July 5, 2019
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When someone has previously called shotgun, and then gets out of the car at all, without calling seat-back. The person who wishes to obtain the position of shotgun shouts "shotgun hi-jack" and takes the shotgun position.
Joe's homey get's out of the car... like a fool he doesn't call seat back... Joe being the genius he is calls shotgun hi-jack and takes the shotgun position. Joe's homey returns to the car... and realizes he is a fool and sits in a non-shotgun position.
by jhirbour June 2, 2011
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