I am going to hop in here, and I'll probably get tagged for it; but, I think it needs to be said. I think Rachel's out of line telling people not to use "This language" here. I, for one, knew exactly what StePH intended with his turn of phrase. I read it as child speak to match the child-centered story on which he was commenting, both because I have no reason to believe it is a racial slur, and because contextually it was pretty obvious. I am sorry, Rachel, that you took it as racist language. Yes, there are some phrases, like the ones you mentioned, that are/may be offensive and that are obviously mocking (intentional or not) certain races, ethnic groups, or cultures. However, I believe that seeing something as bland and benign as what StePH wrote and construing it immediately as a leftover racial slur says more about the person perceiving it than the person saying it.
It would be like construing "I can haz sum?" to be making fun of certain types of language spoken by blacks in the US, when in fact it's a bastardization of l33t speak. Urban Dictionary isn't exactly the most reputable source for word derivations in the same way Wikipedia isn't a reputable source. Both have their uses, but neither of them are respected peer-reviewed journals.