In S1E1, Rory freaks out and tells Lorelai that she might not want to go to Chilton after all. While the two are walking home, they run into Miss Patty, who tells Rory that she found a job for her “male friend.” Lorelai hasn’t heard about Dean yet, but Miss Patty adds, “Oh, he’s very cute. You have good taste,” so Lorelai knows he is the reason Rory changed her mind about Chilton. Rory starts walking away quickly to avoid confrontation, but Lorelai calls after her, “Oh, you’re gonna have to walk faster than that. You’re gonna have to turn into friggin’ Flo-Jo to get away from me!”
Flo-Jo is the nickname of Florence Griffith Joyner, widely considered the fastest woman ever. She set records for the 100 and 200 meter dashes in 1988.