Somebody who advocates for men’s rights. (The rest of the definitions here are biased.) Someone who wants Men And Women to have equal rights in the courtroom, social, and other environments. For the rest of the biased definitions, we get it, your a lesbian misandrist, no need to rant about it on the internet.
The genderbent version of a feminist, basically meaning a person who speaks up for the old power of men to be brought back and for the men to be the superiority on Earth, in its general terms.
"Did you hear about Darrell? He is such a masculinist. He keeps saying how men are going to be the better, more populous gender, and will rule earthlike nobody else exists, like they did in the past."
A word Men's Rights Activists call themselves because they feel that Feminists do not value issues of sexism which don't directly benefit men, likechild custody issues, prison sentencing, etc.. This is such a ridiculous term because it's used with the heavy assumption that leveraging equality for women does nothing for men. Feminists want equal treatment and that means equal expectations in all affairs. Masculinist is simply a redundant term that neglects the idea that Feminism works for both genders.
I'm a Masculinist because men aren't well represented in Feminist Issues.
I didn't want to seem homo by calling myself a Feminist so I call myself a Masculinist.