Ratfinks are generally described as a person who is sneaky, disloyal, and will betray others for personal gain. Some synonyms for the word ratfinks include backstabber, traitor, turncoat, betrayer, Judas, and quisling. A backstabber refers to someone who pretends to be a friend but will eventually hurt or betray you. A traitor is someone who turns against a person, country, or idea they once supported. A turncoat is someone who changes their allegiance for personal gain. A Judas refers to someone who betrays a friend or spouse for money or power. A quisling is someone who collaborates with the enemy in a time of war or crisis. Overall, ratfinks are considered negative characters who cannot be trusted.