Breaking a bottle of chloroform to knock a horse unconscious, then proceeding to insert the horse's penis into your own ass or a partner's, only to have the horse awake mid-fuck and ram the individual's asshole so hard it ruptures his or her intestinal wall and they bleed out. Usually the death occurs in the field, the hospital bed or during the act itself.
Robert: What the hell happened to Todd, I heard he died?
Lee: He totally chloroformed that horse to try to have it fuck him, but it woke up and totally Polish Horse-Rider'd the shit out of him. Literally.
Robert: Shit, well what the fuck happened to the horse? I was going to fuck it.
The act of fighting with a friend and then proceeding to take him/her down and sitting/bouncing up and down on them while yelling "ride a horsy, ride a horsy"
"Come on jonny fight him
No way! He always gets mad when i horse ride him and that's the only way i win."