Originally Posted by
Joe the Rat
I've seen knife-ears used for githyanki (they are sometimes described as being serrated).
The only one I've got is one clan of Dwarves being called "perverts," due to their deviant tendency to use arcane magic. The Mist Elf (from the typical "mysterious mystic isles") is called "fish-boy" based on the smell, but that's more personal than racial.
Hmmm, I think I need more slurs.