• ginzo | Italian Mafia types
• gringo | The word-of-mouth allegations spread rapidly throughout Guatemala: gringos are snatching babies and ripping out their vital organs for sale abroad. [Time mag.] | [see AHD notes on gringo]
• honky | movie star Arnold Schwarzenegger is a honky.
• hunky | esp laborer, East central Europe.
• white trash | in movie _Silence of the Lamb_ (199x), agent Clarice is being called a white trash by the Doctor.
• redskin | Native American. aka American Indian. (see AHD note)
• canuck | Canadian
• redneck | rubes in US of A
• dago | Italian or Spaniard or Portuguese
• Kraut | German. the doctor in movie _Dr. Strangelove_ is a kraut.
• wetback | Mexican, especially those entered USA illegally. (because they swim through Rio Grande river, ~1929)
• Jap | probably originated from WWII, by the Americans
• Chink | probably originated in America, in the Chinese begrudging era
• coon | black person [etymology: because coon means dirty, soiled. ?]
See also: comprehensive and esoteric collection: http://en.wikipedia.org/wiki/Racial_slurs