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<p>I’m also a geezer 
and remember those days. In fact, when I was a Penn undergrad myself, one of my parents’ friends told me that when he was a Columbia student in the 1950s, they’d shout in unison at Columbia-Penn games, “U of P? PU!” And for those of more recent vintage who may not be familiar with the expression “PU,” it’s the first definition in Urban Dictionary:</p>
<p><a href=“Urban Dictionary: PU”>Urban Dictionary: PU;