prickwhistle
The kind of idiotic driver of a very large vehicle (usually a lorry or massive truck) that decides to overtake another turgidly slow vehicle on a motorway, even though they can only go, at best, 2 mph faster than their counterpart. Or, to be fair, any driver who doesn't indicate, cuts me up, chooses not to put their lights on thick fog or is driving like a tosser.
Look at this prickwhistle, blocking up the whole lane because he wants to spend 45 minutes overtaking another lorry... the knob.