Yeah, the zipper was invented in Akron. So it's definitely an old-school nickname. But I like it, it's unique & reflects the community.
Zippy the kangaroo came about via a student mascot contest, what, 50-some years ago? I don't have time to google it this a.m. Zippy won sort of as a joke - ala Yale's fight song "Boola Boola." He's a funny mascot who is wimpy, utterly non-threatening & usually runs away from the other teams' mascots. He's a comical mascot, not to be taken seriously. Again, love it. Though Zippy has a pouch, Zippy was always considered a male until recently, when someone pointed out only female kangaroos have pouches. Lol. Now sometimes Zippy's called a "she." Whatever. But it kinda spoils the non-threatening wimpy-ness of Zippy if he's morphed into a female. It throws a politically incorrect curveball at his harmless, wimpy schtick. Another mascot shouldn't want to beat up on a girl. Lol. It ruins the inside joke.