a guy that selects a lane, that will be used to make a turn he wants... miles and miles before the turn actually will happen.
If the next turn is left, the guy will stay on the left lane no matter what for as long as possible. If the next turn is right, he will stay on the right (which is not such a big problem).
John is a total lane hugger. He was driving the left lane for 30 miles, with guys honking on him constantly, and only then did he make a turn. What a loser!