Editors have specific guidelines they must follow. However, these are often vague (especially if it's hard to tell, for example, if a term is just explaining a racial slur, or if it is in fact racist).
If your definition doesn't get published, it could be for one of two reasons:
A) It wasn't that good or
B) Someone just didn't like it for some reason.
In that case, try again...
However, bitching about them probably won't help.
Other person: "Get a life."
Fortunately, most editors have common sense and abide by the rules, although one can be sure that not all do.
F0 sh0 n1gg4!
2. loosers with no lives who just sit there and deny people there freedom of speech!
Urban dictionary editors: fuck you douche bag we dont like your word even though other people might love it we dont like it so we wont publish it! we are cock sucking cum gargling faggots!
Wow bro that is so typical of those retards