Biphobia is the fear of, discrimination against, or hatred of bisexuals. It need not include homophobia or heterophobia, because there are stereotypes that are specific to bisexuals.

These include, but are not limited to: promiscuity, polygamy, living the swinging lifestyle, and being confused. Often, however, heterosexuals and homosexuals will add more stereotypes based on homophobia or heterophobia. Homophobes may think that bisexuals are gender nonconformist. Heterophobes will often think of bisexuals as maintaining privilege and collaborating with the homophobes. Lesbian feminists sometimes think that bisexual women are giving in to patriarchy.

See also: Sexual hierarchy