In the midst of a CF-Talk thread, S. Isaac Dealey came up with a rather amusing (and quite accurate) definition of the word "buzzword." Despite his repetition of the word "repeated," I felt it deserved to be rep... er, um ... highlighted here:
A Buzzword is:A word that's repeated because other people are repeating it (like "AJAX") instead of a word that is repeated because it represents something which has intrinsic value (like "XML"). In some cases a "buzzword" may be representative of something which has intrinsic value (like "XML") if the word is repeated by someone who doesn't understand anything about it and they are repeating it because the word is being repeated by other people.(From CF-Talk)