Splashboard n. A guard in the front part of vehicle, to prevent splashing by a mud or water from the horse's heels; in the United States commonly called dashboard.
... got in there?" asked Vassili of one waggoner who was dangling his legs lazily over the splashboard of his conveyance and flicking his whip about as he gazed at us with a stolid, vacant look; but he only made answer when we were too far off to catch what ... — Boyhood • Leo Tolstoy