To expect meritocracy and still be disappointed all while being baffled at the same time. Can be used as a verb to describe a scenario where Murphy's mentally disabled cousin comes into play.
This is when unnecessary high volume of anger is realised by an individual for an unknown reason. This is normally directed at close friends and girlfriends. Robson rage is particularly common in people with reddish hair and individuals that attended private education. Early triggers of Robson rage can be as minimal as asking if the individual has put on weight or if he has attempted to dye his hair.