Working blue is a term from stand-up comedy where your subject matter and vocabulary are strictly for adults. A great example of the differences between working blue and not is to watch back-to-back the stand-up films, Bill Cosby's Himself and Eddie Murphy's Raw. If you are working blue in your podcast, it would be a good idea to put in a disclaimer in the beginning of your podcast. Another option is to give your podcasts ratings similar to the ratings assigned to films. For an example of a podcast directory that implements a movie-style rating system, go to Podcast Pickle. With the freedom to rant, rave, and swear, few podcasts out there work blue. An understood rule of podcasting is not to swear just for swearing's sake, and in many instances, editing out cuss words with sound effects can add a bit of humor to an already funny podcast.