The term 'MOB PARIAH' can be broken down into two crossword solutions: 'RAT' and 'MOB'. The word 'RAT' is a three-letter noun that refers to a small rodent with a long tail. It is often used as a derogatory term for someone who betrays their friends or colleagues. The word 'MOB' is a three-letter noun that refers to a large group of people, usually with criminal intent. It is often used to describe organized crime groups or gangs. Together, the two words form the phrase 'MOB PARIAH', which is used to describe someone who is an outcast from a criminal organization.