nigger lover

noun3

1. •
   (slang, offensive) A white person considered excessively fond towards, protective of, or considerate to blacks.

   • At once he said, ‘If you're not careful, Matty dear, you'll become a proper little nigger-lover.’ — 1952
2. •
   (offensive, historical) An abolitionist as considered to be a race traitor.
3. •
   (slang, offensive) A non-black person who is romantically involved with or married to someone who is black.