The name for which the founders of the web site UrbanDictionary.com undoubtedly meant to use, since an overwhelming number of entries are just bad puns by dudes obsessed with penis jokes.
Tom: Hey man, did you see Urban Dictionary's word of the day?
Casey: No. Was it another lame pun?
Tom: Oh, um, yeah... that website should just call itself UrPUN DICKtionary!
Casey: Please have sex one day.