I still remember one Packer preseason loss vs. the Jets (figures, huh?) back in '84 or '85. The game got so bad, one whole section (underneath the old northeast scoreboard at Lambeau Field) stood up, pointed at the section next to them and shouted "LESS FILLING!"
The other section responded in kind, "TASTES GREAT!"
Back and forth they went for a minute or so. To a 10-year-old, that's HILARIOUS. Nearly split my sides.
To celebrate, here's some "Less Filling! Tastes Great!" classics from the old days: