jojo · noun1
Reportedly coined on the spot by an employee of the Flavor-Crisp pressure fryer company at a Chicago trade show in the early 1960s. The potatoes were used to "clean the grease" between demonstrations of cooking chicken and fish, but customers unexpectedly started eating and enjoying them, leading someone to inquire what they were called.
Jojo · proper noun2
Reduplication of Jo.
Etymology from Wiktionary, CC BY-SA 4.0.