A men’s rights activist or advocate (used to refer to a person who campaigns for or supports the protection of men’s rights and interests).
Men’s Rights Activists are in theory ‘fighting for men’s equal rights’. However in reality, the movement commonly focuses on fighting against feminism. This is unfortunate as there are many urgent men’s issues including male suicide rates and mental health issues, but it seems the majority of the MRA group are acting against women, rather than for men. You’ll most likely come across the term on social media as the group are infamous for ‘trolling’ and harassing women and feminists online.