The act of checking cars for unlocked car doors. The person(s) commiting the act of "car jumping" then opens the door and steals whatever is in plain sight. Then you haul ass and get away from the scene of the crime.
Me and my boy once car jumped this one car and got a gameboy SP, baseball glouve, and a wet swimsuit we dumped, thats car jumping for ya!
by D-REAL-201 April 09, 2010