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Heterosexism - The false assumption that everyone is or should be heterosexual because it is assumed to be the only acceptable and viable life option; this assumption often leads to discrimination based on sexual orientation; a form of homophobia.

by dijjn June 04, 2003
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prejudiced belief in the social/sexual/moral superiority of heterosexuals or heterosexual attraction over non-heterosexals or same-sex attraction.

one's actions or attitude as a reflection of such a prejudice.
justin took the brunt of his peers' heterosexism throughout high school.
by dagger_grrl February 20, 2004
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A discriminative attitude grounded on the sexual orientation criteria, and more specifically -our society being still what it is- a discriminative attitude towards gays and lesbians.
The heterosexism of certain definitions of the Urban Dictionnary really scares the shit out of me.
by Ysengrim January 02, 2004
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Heterosexism is a term currently being passed around by liberal, intelligentsia wannabes who subscribe to the current "gay agenda", used in an attempt to rhetorically link the plight of those poor "oppressed" homos with the very real and pressing past and current struggles against racism and sexism. People who view the active practice of homosexuality as being morally, religiously, or socially unacceptable are likely to be labeled as heterosexist. This differs from homophobia in that, rather than fearing homosexuality, a 'heterosexist' will simply view heterosexuality as being the social, cultural, moral, and/or religious norm.
"Only heterosexists would protest the hanging of rainbow-colored 'acceptance' flags over dorm entrances."

"That militant femnazi dyke in sociology class accused me of heterosexism today."
by Fachxphyre April 28, 2006
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Heterosexism is the prejudice against and exclusion of any and all. people who aren't heterosexual heteroromantics.

This term is used to be more inclusive of those who may face prejudice based on their orientations without implying that people who hold that prejudice have a mental illness they can't control.
I've come out to my family like 10 times and they always think I'm joking or confused or seeking attention. I'm so sick of their heterosexism. Just because I'm a woman engaged to a man, that didn't automatically make me straight.
by ughhseriouslywow November 11, 2016
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