Trigenderism is a non-binary gender identity in which one shifts between or among the stereotypical behaviors of male, female and a third gender (genderless, a mix of male and female, or any other variety of genderqueer identities).Leslie Feinberg, Trans Liberation: Beyond Pink Or Blue, page 53-4, Beacon Press, 1999, ISBN 0-8070-7951-0, ISBN 978-0-8070-7951-5.