The episode: “The Girl in Lover’s Lane,” ep. 509
The riff: Observed by Servo as a harried waitress sizes up the movie’s two protagonists with barely veiled contempt in her face.
The explanation: I believe this is a reference to a series of commercials and print ads for Bounty paper towels that existed from 1970-1990. Actress Nancy Walker played a waitress character named “Rosie” for years in the ads, which touted Bounty’s absorbency and coined its slogan “The Quicker Picker Upper.” The writers make it slightly more difficult to pick out the source of the riff by just saying “Rosie” instead of “Rosie the waitress” or making a direct reference to Bounty. “The early years,” on the other hand, is a very popular MST3k-ism when describing characters.
Novelty factor: I’ve never heard of these ads before, but I’m surprised by the thought that an actress could play a specific character in an ad campaign for 20 years.