Stock photography, photos: Horse's ass Stock photos of Visual representation of the slang expression for dumb or stupid - horse's ass Photograph: © Alan Oliver Click for a larger image and more information Keywords associated with this stock photo: horse, pony, ass, arse, bum, butt, bottom, rear, hind end, behind, insult, slang, colloquialism, term, concept, stupid, dumb, cut out, cutout, daft, silly, idiot, tail, equestrian, equine, fur, hair