bike-whack
v.β Β«A straight bike-whack down through steep and unforgiving terrain. We lost our only odometer, a niterider battery pack, and I broke a spoke. It was nasty stuff.….We bikewhacked again and found no bridge.Β» ββPrimal Quest Race Report: Day 3 – Bike-Whack from hell” by John Yip MyNextRace.com Mar. 8, 2005. (source: Double-Tongued Dictionary)