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 until Glenn Howerton tweeted that, "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.”|