Nikki Potnick was a student alongside the Gang at Saint Joseph's Preparatory School/Notre Dame High School.
- Season One: Underage Drinking: A National Concern (mentioned only)
- Season Seven: The High School Reunion (mentioned only)
- There was fan speculation that Nikki Potnick was the real name of the Waitress, caused by two unrelated jokes pertaining to nametags, one where Frank steals the nametag of Nikki and another where the Waitress claims that they didn't have a nametag printed for her. Glenn Howerton later tweeted "Sorry, but the Waitress' name is not Nikki Potnick. If u wanna know who N.Potnick is, re-watch S.1 Underage Drinking. First 10 mins." 
|—||“You wanna know what else what would happen? We drove Nikki Potnick's car into a tree on Kelly Drive...”|
|“...with Sweet Dee in the backseat, puking all over the headrest because some guy talked to her that she liked, remember that?”||—|
|—||“Okay, Frank, first off, Nikki Potnick is a girl, okay? And secondly, she's not 65 years old.”|