jump-out
n.— «Finding winners at meetings restricted to horses from certain zones is hard yakka. Horses that haven’t been to the races for months. Horses that are racing out of their grades and over unsuitable distances. Horses that have had official barrier trials or unofficial jump-outs.…They argue jump-outs should be made official, so the results are made public.… Jump-outs have been part of the scene for years. Most tracks hold them on sections of course proper that haven’t been used. They start in the home straight and end down the back straight. They are usually 800 metres, though trainers can let their horse go only a couple of hundred metres.» —“Forget the horses and pick a winning traine” by Craig Young Sydney Morning Herald (Australia) Nov. 19, 2007. (source: Double-Tongued Dictionary)
Further reading
Outer space, used with its modern meaning, appears as early as the 1840s in a poem by Emmeline Stuart-Wortley. Soon after, Alexander von Humboldt was using variations on it in his writings about the cosmos. By 1901, H.G. Wells was using outer space...
The expression to turn on a dime means “to change quickly.” Early on the phrase referred to horses or horse-drawn vehicles and later to motorized ones, and suggested the idea of changing direction quickly and easily without needing a large turning...