I was searching for the origin of this phrase, as I have also heard it on South Park a few times, and even on the Family Guy, Stewie has said it at least once. I had recognized it from the Pink Floyd song "Pigs (Three Different Ones)", but I wasn't sure if it originated there or if Roger Waters had borrowed it from another source. In my quick seaerch, I also found the rest of the lyrics to the song, and it definately made more sense...carry on...