Over the past two years the rising tide of adult male fans of the "My Little Pony: Friendship is Magic" cartoon has swept upon the shores of the internet. Forums, Facebook, YouTube and pop culture conventions alike have been caught up by bronydom.
Source: wiktionary
Like many other subcultures considered perverse by much of the general public, bronydom has its roots in the infamous website 4chan.org.
Source: wiktionary
Though there are some female bronies (some call themselves “pegasisters”), bronydom — at its core — is simply about just being kind and having fun.
Source: wiktionary