A group of 2 or more girls, most often in college or highschool status, who out of pure boredom decide to turn gay on each other. This is sometimes seen as innocent curiosity or intimate girl-to-girl bonding. These relationships usually end with one girl moving on with her life and leaving the other(s) hanging or the girls just getting tired of being lesbian. You can find these girls holding hands at punky little cafés or cuddling at the park (touching each other when they think no one is looking). Needless to say these relationships end rather quickly, sometimes in easy friendship or complete withdrawal.
Kim: We used to be fling girls.
Haley: Really, are you still gay?
Kim: Oh no, it was experimental, we went out for about a month. Now we're just really good friends.