The E2 Ethnic Slur List
African
Nigger, Tar Baby, Coon, Darkie, Jigabo, Porch Monkey, Blue Gum, pickaninny
Arab
Towel-Head, Sand Nigger, Camel Jockey
Asian
Chink (Chinese), Slant/Slant-eyed, Rice-eater, Slope, Yellow, Gook
British
Limey, Sassenach
Canadian
Canuck
Caucasian
Red Neck, White Bread, Casper, Whitey, Honkey, WASP, Poor White Trash, Cracker, Trailer Trash
German
Kraut
Hispanic
Beaner, Spic, Wet-Back
Irish
Mick/Mic
Italian
Wop, Dago, Guinee, Greaseball*
Japanese
Jap, Nip
Jewish
Hebe, Hime, Kike, Jew**
Notes: I know this isn't close to a complete list so if anyone thinks of some more please /msg me and I'll add to it. I guess I also need to mention that I don't approve of the use of these words outside good racial humor. Also, I'm not sure how Caucasian ended up with the longest list.
Oh, and the whole category of "Asian" is horribly offensive. But, then again, the kind of person who uses these words couldn't tell the difference between a Chinese person and a Korean if their lives depended on it.
* I think just about anything with "grease" in it can be used when talking about Italians.
** Unlike with most other categories, "Jew" can easily be a racial slur by how it's said or what adjectives are added to it, such as "dirty Jew".