When you and a homie have the big sex. This can only occur between two straight males.
Doesn't classify as gay if you or the homiewearing socks, or if ya'll'st say no homo.
1) A group of people who enjoy My Little Pony and go on 4Chan. Horsefuckers aren't necessarily cloppers, and usually are against bronies, for the majority being newfags.
2) A person who fucks horses
1) There's an anon on the /mlp/ thread who keeps a BlueFast toy in a jar of his own cum
2) A man was arrested a couple months ago fucking a horse. Heh heh. Horsefuckers.