The term scummier is typically used to describe someone who engages in dishonest or unethical behavior, particularly when it comes to financial matters. There are many different synonyms that can be used to describe such individuals, including terms like fraudster, con artist, swindler, cheat, grifter, hustler, and scammer. All of these terms suggest someone who is willing to take advantage of others in order to make money or gain some other type of personal advantage. While the specifics of their methods may vary, scammers of all kinds use deception and manipulation to gain the trust and then exploit the vulnerabilities of their victims.