queer theory, an obscure academic discipline based largely on the writing of the late French intellectual Michel Foucault, who believed that society categorizes people—male or female, heterosexual or homosexual—in order to oppress them. The solution is to intentionally blur—or "queer"—the boundaries of these categories. Soon this "queering" became the predominant method of discussing and analyzing gender and sexuality in universities.

https://en.m.wikipedia.org/wiki/Michel_Foucault