boof

 rhymes with "roof"

 A kayaking maneuver in which the paddler launches off the lip of a drop and lands flat, keeping the bow above the surface to avoid being driven underwater by the falling water. Also used as a noun for the rock or feature used to launch the move. A good boof is one of the most satisfying things in whitewater — a clean, dry, controlled flight.
Etymology
 Onomatopoeic — the sound the hull makes when it lands flat on the water below.
paddling river water
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