to fuck a busty chick so hard her boobs smack her in the face. resulting in a slap with a red mark, a black eye, or if its hard enough she gets knocked out

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.