The term 'shady dealer' is often used to describe someone who is involved in illegal activities. The two crossword solutions for this term are SPIV, which is a British slang term for a person who engages in illicit activities such as black market trading, and HUSTLER, which is an American slang term for someone who uses aggressive or dishonest tactics to make money. Both terms refer to people who are involved in shady dealings and often have a negative connotation.