Green’s Dictionary of Slang

1. one who conducts a relationship with a person of another race.

2006

Urban Dict. 12 Sept. 🌐 When a member of a particular race, usually a caucasion female, willingly develops a relationship with a member of a different race, usually an African-American male.

2. (N.Z. prison) one who adopts the characteristics or culture of a race other than their own.

2001

D. Looser Boobslang [U. Canterbury D.Phil. thesis] 151/1: race trader n. one who seeks to identify with, or pass as a member of, an ethnic group different from his own.