Top Definition
Jack Back

1. To steal something back from someone who stole from you (i.e. jacked you).

2. To jump, attack, or otherwise harm in retaliation for the same thing having been done to you.

Popularized by the rap song of the same name.
Guy 1: Hey, there goes that dude who stole my Cd's

Guy 2: Did he lock his car door?

Guy 1: No, let's hit him with a jack back!
by MastaRoe March 17, 2010
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An episode of LOST that is Jack-centric.
"Dammit! ANOTHER jackback this week?
by skc107 May 30, 2007
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