I don’t know what a “fossbro” is. Me questioning it has nothing to do with a word being “gendered” as you say. It could be “fossthey” “fosssis” or whatever variation, I don’t care. And I don’t believe the person who used the term “fossbro” was talking about gender either. “Bro” is used as a genderless word often times similarly to “dude” or even in some cases “man.” Why you trolling? And bad at it at that.

Please define “fossbro” I have never heard anyone use that before