The word “brony” has become so loaded over time that it’s hard to use without bringing up unfortunate connotations. I’d like to leave aside the more… colorful aspects of the group and stick with the loosest definition possible: a brony is an adolescent or adult male who watches and enjoys the cartoon My Little Pony: Friendship Is Magic. (To answer your inevitable question: Yes, I have watched the show. I do think it is very clever and has a lot of crossover appeal. The quality declines after the first season, but if you can get past your “ew, cooties!” mindset, you might find something you enjoy.) The show is so popular with males that a female fan is almost unusual and strange. When someone brings up MLP, as a citizen of the internet, you just kind of assume it’s a guy. Just as, if someone is fanatical over Loki, it’s reasonable to think they’re probably a girl. It’s an intriguing phenomenon: whereas a girl liking superheroes is unconsciously viewed as “trading up,” a boy liking something meant for girls is automatically viewed as shameful.