One of my colleagues uses this word for someone who is driving and slowly tries to inch by you when his lane is merging into your lane. It's perfect. I hope it takes off!
I've only known it to mean a cheat. Some states require drivers to admit entering traffic, but one at a time. What's NJ say? One of the few civilized things about Indiana is that drivers DO admit entering traffic for the most part. But, pedestrians BEWARE!