What is "marjorine"

"Marjorine" is the ninth episode in the ninth season of the American animated series South Park. The 134th episode of the series overall, it originally aired on Comedy Central in the United States on October 26, 2005.

In the episode, Butters must fake his death, dress up as a girl, and infiltrate a slumber party, in order to retrieve a future-telling device which Cartman is convinced the girls have.