Scrubber in their decade old Vaux banger cutting up traffic to try and get ahead at any cost, hope that whole car length made all the difference in getting you back to your hovel that bit sooner.
Illegally U-turns, is offended when someone misjudges, reverses on a main road and right next to a T-junction, and then threatens to knock someone out despite looking 60. Grow a pair.
Motorway fastlane tailgater, especially worse as had kids in the back.