Cisgenderism
Cisgenderism (also called cissexism, genderism, or gender binarism) is the ideology that there are only two genders, and that one's gender should conform to one's assigned sex at birth. This normative belief stigmatizes gender nonconformity, and leads to discrimination against transgender and intersex people. It is pervasive and systematic in Western culture, and reflected in the cultural and legal practices across numerous countries.
The concept of cisgenderism originated in trans studies in order to distinguish transphobia at an interpersonal level from anti-transgender prejudice at a cultural or systemic level. This is analogous to heterosexism, as contrasted with homophobia.