girl-on-girl ‎(not comparable)

  1. (informal) Involving sexual contact between women; lesbian.
    • 2005, Richard J. Novic, Alice in genderland: a crossdresser comes of age (page 172)
      As a friend performed, the pros would take turns sashaying out onto the dance floor to pass her a bill in a tantalizing moment of girl-on-girl action.
    • 2010, Kate Emburg, Michael G. Cornelius, Susan Slutt, Girl Dick (page 129)
      Lots of straight guys will pay to see hot girl-on-girl action, and you've got to admit, that was pretty hot.