A simple word you can use in any situation at anytime. It is meant to have no true meaning.
Best times to say it are when it is dead silent or when you are trying to quiet a room.

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.