Terf is a trans exclusionary radical feminist.
From wikipedia:
Radical feminists view society fundamentally as a patriarchy in which men dominate and oppress women. Radical feminists seek to abolish the patriarchy in a struggle to liberate women and girls from a perceivedly unjust society by challenging existing social norms and institutions. This struggle includes opposing the sexual objectification of women, raising public awareness about such issues as rape and other violence against women, challenging the concept of gender roles, and challenging what radical feminists see as a racialized and gendered capitalism that characterizes the United States and many other countries.
Personally, I do not believe that share of voice, money and power between males and females is unequally held because of any gender expression, I believe it is because of sex. Neither do I believe that share of voice, money and power should be determined based on either sex or gender expression.
Every human should be free to dress how they please and not be discriminated against on the basis of how they present themselves. Roles, behaviours and other social expectations should not be categorised based on sex or gender, beyond biologically imposed functions around reproduction and lactation.
Until women have equal representation, share of voice, influence, money and power, I believe we cannot loose sight of the fundamental determining factor that divides those likely to have more power from those who do not and I believe that factor to be sex and not gender expression.
I do not believe that women as a class can opt out of their oppression and instead, as a class we should continue to challenge the structures that continue to entrench the differences between the sexes.
My feminism is not defined by gender but my sex class is impacted by the concept of gender roles, by misogynistic opinions, by patriarchal structures in society, by sexual objectification and sex based violence.
The fact that other people, including men, are the subject of poverty, sexual violence and marginalisation is important but is not relevant to my feminism.