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".

Someone who will try to jack you for your paper or something of value.

In the world of drug dealing, usually a group of individuals who make their living setting up and then robbing unsuspecting hustlers. Can rob by force or wits, either way a force to be avoided. Sure signs are guns, excessive talk and lies, large groups of similarly dressed/similar looking people involved in a transaction.

someonee who steals your style,words,and/or looks!
an imitator who is a dumbass for not being themselves and "jacks" everyone else's style to make up there coolness!

A female, who often goes by the name Lauren, who enjoys taking objects, mostly straightedges, from their Geometry partners. They are often seen yelling and looking for their protractor, realizing it is gone, and jacking someone else's. They have serious problems.

Used to say someone is lieing. or your so suprised you just cant believe what they said.

someone who begins shooting another player in a video game after that player is already being shot, and takes the kill.

Jacker is a term bomb-heads use for needles.