How to Tell Your Yippies From Your Yuppies
Yippies: Members of the 1960s-era Youth International Party [wiki], a far-left political group that had some pretty theatrical ways of expressing their views. Yippies are known for, among other things, causing a near-riot by dumping bags of money onto the floor of the New York Stock Exchange as means of mocking conspicuous consumption and unapologetic materialism.
Yuppies: Young urban professionals of the 1980s. Yuppies are known for, among other things, conspicuous consumption and unapologetic materialism.
Yippies: Often said, "Don’t trust anyone over 30."
Yuppies: Were often older than 30. And they probably would have proved Yippies right, had the groups’ members not suspiciously overlapped.
One Thing They Can Agree On: German cars. Yippies drove Volkswagens. Yuppies drove BMWs.