After a quick search on Answers.com, I came up with this:
http://www.funtrivia.com/askft/Question55965.html
Check out the responder; hilarious.
I empathize with you Lord Humungus, but I too, have heard the quote, yet I too, do not have a definitive answer as to where I have heard it. My first instinct tells me that it most likely came from a comedic genre of film or show, but other than that, I have not much more to offer.