a jersey speed bump is a pedestrian who is not paying attention J-walking while you are driving causing you not to notice them and eventually hitting them., It can also be used for someone taking too damn long to cross the street.
You're driving in your car with a buddy, all of a sudden you hear a loud noise and feel a huge bump., When your buddy asks "what the hell was that?", you can simply reply "Oh, just another Jersey Speed Bump."
by martian87 January 25, 2010