sexist

Etymology

From sex + -ist, after sexism.

noun

1. A person who discriminates on grounds of sex; someone who practises sexism.
   When you argue. .. that since fewer women write good poetry this justifies their total exclusion, you are taking a position analogous to that of the racist—I might call you in this case a "sexist"—who says that since so few Negroes have held positions of importance relative to the majority race, their exclusion from history books is a matter of good judgement rather than discrimination. Both the racist and the sexist are acting as if all that has happened had never happened, and both of them are making decisions and coming to conclusions about someone's value by referring to factors which are in both cases irrelevant. as quoted in: 1985, Fred R. Shapiro, “Historical Notes on the Vocabulary of the Women’s Movement”, in American Speech, volume 60, number 1, page 6: 18 November 1965, Pauline M. Leet, Women and the Undergraduate, Franklin and Marshall College, page 3

adj

1. Unfairly discriminatory against one sex in favour of the other.
   What was all that about? Well, like all women, she's shoe-mad. 't's a bit sexist, isn't it? Do you know one woman who isn't obsessed with shoes? No, but I only know one woman. And she just left the room shouting "THE SHOES!" 2006 Feb. 3, Graham Linehan, The IT Crowd, Season 1, Episode 2
   A defender of communitarianism might argue that just because extant communitarian theories are sexist, it does not follow that communitarianism is inherently sexist. 2013, Susan J. Hekman, Moral Voices, Moral Selves: Carol Gilligan and Feminist Moral Theory