someone who begins shooting another player in a video game after that player is already being shot, and takes the kill.
You fucking jacker! He was MINE!
by G.G. November 24, 2003
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Used to say someone is lieing. or your so suprised you just cant believe what they said.
Tom:I hooked up with to hoes last night.

Brady:U a jacker!
by Smartestpersoneverr. December 23, 2009
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To be massively muscluer and Beautiful
My Friend Joel is Jackered
by RedDeer July 14, 2011
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person who assumes ideas without processing...same with style, speech, countenance, and heredity. Mostly used when someone jack-off is jacking your shit. if they're stoned...they are, of course, a "high-jacker".
"Whattup, jacker?"

"nice shoes, jacker"
by jek September 8, 2003
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Jacker is a term bomb-heads use for needles.
by kefka June 5, 2004
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A trend hopper, a wave rider, someone who doesn't form their own opinion and follows the hype. Someone who reps something without fully knowing/experiencing it just for the approvement of others.
Person 1: Have you heard of the anime lain?
Person 2: Yeah! I watched it and its a 9/10!
Person 1: What the fuck? Lain is dogshit! What did you like so much about it?
Person 2: Well... I-I- saw it on tik-tok and uhh-uhh.... well I liked the uhh... THE ATMOSPHERE!
Person 1: What? Why are you fake jacking it? Fucking fake jacker! How can you not name 1 thing you like from a 9/10 series?!

This person is a fake jacker because they saw how popular Lain was on tiktok and followed the hype and said it was good, when in fact they didnt' really like nor understand the show and are only liking it for the approval of others.
by BellyBuster4k September 28, 2023
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One who leaches on to your friends through you, distances themselves from you, but still tries to stays friends with all your friends.
I told that bitch never to call me again, but she's still blowing up all my homegirls' cellies, actin like they still tight. I shoulda known that ho was a no good friend jacker.
by K. Clinton May 10, 2008
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