It isn't that well defined. To start with, which opinions? I may disagree with your (hypothetical) opinion that Go is the best language developed so far. I wou

It isn't that well defined. To start with, which opinions? I may disagree with your (hypothetical) opinion that Go is the best language developed so far. I would not call you "bro" because of that, even if you were a non-obese male. Bro in this context refers to "tech bro' oligarchs" (https://www.wordorigins.org/big-list-entries/broligarchy https://www.wordorigins.org/big-list-entries/broligarchy dates the popularity starting last month). https://en.wikipedia.org/wiki/Brogrammer https://en.wikipedia.org/wiki/Brogrammer notes that '"Brogrammer" or "tech bro"' are "often used pejoratively to describe toxic masculinity and sexism in the technology industry". This definition highlights how it's not merely 'opinions with which I disagree', but a specific set of opinions. FWIW, The Atlantic is the publication which brought us the term "Bernie Bro", "to describe young, white, progressive men who, in his view, support unrealistic progressive policies and promote the Bernie Sanders campaign obnoxiously", including "sometimes attack in very sexist ways" - https://en.wikipedia.org/wiki/Bernie_Bro https://en.wikipedia.org/wiki/Bernie_Bro The connection there is the toxic masculinity and sexism.