In the event of meeting an individual with the characteristics of a Black Cat Bastard mention in conversation that you have recently purchased a black cat and wait for the reply. For certain the reply will be something like this "I have two black cats both blacker than yours."
(black cat bastard) An individual who has always done more, seen more or felt more than you. e.g. After explaining about your recent holiday a Black Cat Bastard would inform you that they had been to the same place, stayed in a better hotel for a longer time period and had a much better or worse time than you. Also known as the concept of a Black Cat Bastard.