<p><strong>Noun</strong></p><ul><li>Anal sex, especially between men.</li><li>Law: any sexual contact other than heterosexual vaginal intercourse.</li><li>Any sexual contact that is stigmatized as unnatural or immoral.</li></ul><p><strong>Adjective</strong></p><ul><li>Law: of or relating to any sexual contact other than heterosexual vaginal intercourse.</li></ul>