1. Used as a derogatory term, indicating your humor at their "Nobheadish" behaviour. Usually after a fail, or stupid comment.

2. Used to describe a person that has nobhead-like qualities, but in a humorous way

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.