Rat finks are people who are dishonest and unreliable. Synonyms for this term can include snakes, backstabbers, deceivers, traitors, and betrayers. These terms describe individuals who are willing to deceive others for their own personal gain, and do not have a moral compass. They may lie, cheat, and steal without remorse. The term rat finks has been used in pop culture to describe individuals who betray others, particularly in films, books, and television shows. When dealing with people who exhibit these traits, it is important to be cautious and not trust them blindly, as they may be willing to betray you if it suits their interests.