The dumbfuck that zigzags in and out of lanes thru traffic, cutting everyone off and carelessly driving just so they can try being ahead of others.

When you eat dirt for the first time and leave your family to build a shack in the woods

Someone who does provocative things like texting, talking, checking facebook, etc. on their cell phones while driving, completely disregarding the safety of everyone else.

Also known as a flagperson, one who wears brightly coloured work clothes and directs traffic. Usually carries a handheld traffic control sign with "stop" and "slow" written on either side. Most often seen around construction zones to ensure vehicle and pedestrian traffic flows safely past the work area.