The male slurs imo cannot be something like ___rapist because I can see them on x or 4chan joking that they are rapist and finding sick pride in being called that. It also has be insulting in a degrading kind of way, stuff like jackass and douchebag doesn’t reduce them like cunt or holes for us, theirs just means they are being jerks.
It also has to insult them comparative to other men’s view on them. Since they don’t care about pleasing women and they compare their status to other men it has to include this. This is why I don’t think ___n-word or is less as effective, it has to claw at their own worth deep down and maybe also has to be something that one of those valley tech women would say to get them triggered because of how much they seethed about that one cringy work video “itty bitty titties and a bob” thing.
My suggestion is something like “small dick energy” ; no one wants to have small penis’s and they may have penis envy of another man. It also calls back to Pinterest/tumblr women calling certain men “big dick energy” which they find annoying.
ETERNAL FUCKING MYSTERY AIN'T IT?!