One would perhaps not expect to find
offensive slang, misspellings or incorrect grammar in the Urbane Dictionary.
Urban Dictionary however? Par for the course, old boy. The Oxford English Dictionary (OED) is quite urbane, though congnizant of urban slang. A good, truly urbane dictionary, however, would not seek to be prescriptive, it would faithfully report usage, both vulgar and sublime, without overt judgement or censorship. Thus, the OED and
Urban Dictionary truly need each other, in the grand scheme of things.