Omnisexual

Omnisexuality is sexual attraction to all genders/every gender. By some definitions, this is a synonym for pansexual. By other definitions, it is similar to pansexuality but with gender playing a role in attraction.

History
As an orientation label, "omnisexual" dates back to the 1990s at least.

In a 1993 book And then I met this woman: previously married women's journeys into lesbian relationships, a woman named Gayle describes a woman named Sue whom Gayle had fallen in love with many years prior: "[Sue] does not consider herself a lesbian. The last time I talked to her, she said she was 'omnisexual.' She doesn't like labels."

Also in 1993, the "Gays and Lesbians On Campus" club at Canberra University in Australia changed the club name to Jellybabies, noting in the school's journal WORONI that "Many of us in the group felt that the title Gays and Lesbians on Campus no longer reflected the make-up of our members and was not sufficiently welcoming for people who identify as bisexual, omnisexual, fluid, unsure, queer, autoerotic [...]"

Two of the 101 "gender outlaws" listed in Kate Bornstein's 1998 book My Gender Workbook called themselves omnisexual, with one of them writing "I'm a butchy-femme, omnisexual, polyamorous, genderbent, kinky, queer" and the other one writing that they were an "omnisexual, omnigendered" trans man.

In 2020, the date of March 21 was proposed as Omni Pride Day, because rotating the M and N in "OMNI" makes it resemble the numerals 0321.