on the flat

on the flat

1. On a level plane, i.e., without slopes or hills. I'd actually recommend building the house into the side of the hill—if you build it on the flat at the bottom, you run the risk of flooding during heavy rainfall. They've designed the marathon so that the majority of it is run on the flat.
2. In horseracing, taking place in an open course without jumps. The jockey is much better on the flat than he is in races with jumps.
See also: flat, on

on the flat

1 on level ground as opposed to uphill. 2 (of a horse race) on an open course as opposed to one with jumps.
See also: flat, on
References in classic literature ?
That sharp stake at the landing had torn off the strip of batting nailed on the flat.