A lipstick lesbian is a woman who is putting up a front of being a lesbian when in fact, she is merely curious about
lesbianism.
The use of the word lipstick refers to the fact that these women are putting up a sexual facade similar to the facade that women of all
sexual orientations put on when they apply make-up. Make-up hides the real woman underneath, and a woman who is a lipstick lesbian is also similarly
putting on a front. While being with a woman is something they have desired, they ultimately are just curious and not serious.