Not to also be a dick, but it looks like the definition is more like "a pronunciation of a word that can be used to identify a particular cultral group." The definition you've used appears to be a fairly major distortion of the original. Personally, I don't trust definitions from "The American HeritageŽ Dictionary of the English Language" since I noticed that their definition of irony was in fact the definition of sarcasm.

Perhaps a better term to use would be FUD.