Linea Nigra is the vertical skid mark left on the chest of a woman after she gets titty fucked. This appears more commonly on smaller breasted women, as the man has to squat lower and spread his legs wider in order to facilitate the procedure. In Obstrestics & Gynecology, Linea Nigra is the name given to the dark pigmented vertical stripe, that sometimes appears on the abdomen of a pregnant woman.

Referring to women who are sexually or romantically attracted to other women. Applies to both lesbians and bisexual women, as it is only the same-sex attraction that matters, not any other attractions the women may have.

Originates from the Greek poet Sappho, a bisexual woman from the Isle of Lesbos, from which we get the term lesbian.