To physically assault someone, either with your fists or with a weapon, such as a baseball bat, pool cue, axe handle or pipe; in simple terms, a beatdown. The "Jersey" part of the phrase is a slang term for the State of New Jersey in the United States. Residents of New Jersey are known for being a bit more "physical" than most Americans when it comes to resolving disputes...
When I walked out of the bar and saw some scumbag pissing on the side of my car, I gave him a Jersey massage that he'll never forget.
by Led Zeppole March 11, 2004