This is a very specific hate, and I'd be interested to see if anybody else gets this:
I hate it when I'm on a motorway/duel carriage way with the cruise control on at a steady speed. Then somebody overtakes me and pulls back into the lane in front of me. Then slows down. Then, as I don't want to turn my cruise control off because I can't be bothered, I over take them back again. (Bear in mind that I haven't altered my speed in the slightest throughout this entire process) and then THEY look at ME like I'm a dickhead for re-overtaking them.
****s. If you've insisted on overtaking me, it should be because my speed was too slow for you. Don't then slow down to slower than what I was doing and think I'm a twat for maintaining a certain speed.
Absolute ****s.