Coal-burner is a slang term used to refer to a person who is in an interracial relationship, specifically a white woman dating a black man. The term is considered derogatory and offensive, and it perpetuates racist stereotypes. There are several synonyms for coal-burner that are less offensive and more respectful. These include interracial couple, mixed couple, biracial couple, and multiethnic couple. These terms accurately describe a relationship between people of different racial backgrounds without perpetuating harmful stereotypes. It is important to use language that is inclusive and respectful towards people of all races and backgrounds.