It is a burrero euphemism that takes the concept of "light of helmets" or "casquivana" for a woman of liberal sexual mores a step further. It is precisely because of the speed of the race mares, that if they mark on the stopwatch "one minute and forty seconds the mile" they are considered very fast.
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list