noun. A horsefucker.
Real citation: "Brushing them, caressing them, feeding them, riding them—these people are always with horses, and horses are always with them. So what truly differentiates an average equestrian from an extraordinary equestrian? One way or the other, both derive pleasure from horses."
(Charles Munde, "The Animal in You," Feb. 23, 2006, The Stranger, http://www.thestranger.com/seattle/Content?oid=30811)
Made-up citation: "Being an extraordinary equestrian comes with extraordinary responsibilities. Whoops, he died, never mind."