It means "men having power, or free of power women hold"
And if you run into the right ones, the mask comes off entirely. Just look at the production of The Power and you'll get plenty of great examples of misandry on display, proudly.
I suppose i'm trying to defend a position that's not my own, and yeah, using "men" to describe a system created by some men to advantage all (or at least white) men in a broad way is absolutely sexist - but it's hardly the main issue here.
the system wasn't created to advantage men, otherwise feminism wouldn't have happened.
The system was created to advantage the wealthy and powerful, and keep them that way. That they were white or male is incidental. Any other race or gender in that position can and will create the same problems.
Saying something ridiculously sexist like "There wouldn't be wars if society was run by women" or any other similar forms such as "the future is female" is just as braindead stupid as someone saying:
"Racism would disappear if X was run by Y people"
It's not the color or gender of the people, it's the incentive that the positions of power create to subjugate others.
Feminists actively promote the idea that just having women in power solves problems, and that is a blatantly stupidly sexist idea to believe.