whoop n. (also whoop-de-do) a bump or undulation in a trail used for riding or racing motorcyles, bicycles, or motorbikes. (source: Double-Tongued Dictionary)
whoop n.— «Two weeks ago I listened while Karolyn and Julia talked about the steep downhill and the series of “whoops” at the beginning of the trail. “Whoops” are like moguls in downhill skiing, they are mounds that you ride over—don’t forget you...
whoop n.— «Much of the trail has developed a “cupped” condition, with a large berm of soil having built up on the outside edge of the trail. In places, the cupping is quite deep, and the undulations in the trail (known as “whoops” in motorcycle...