bike-whacking
n.— «During September’s Subaru Primal Quest, a 400-mile battle of wits with Washington state’s rugged North Cascade mountains and mazelike coastline, Kloser said two impossible-to-pedal mountain bike legs through tangles of impenetrable brush were dubbed “bike-whacking.”» —“Language of Pain in Adventure Racing” by David O. Williams Rocky Mountain News (Denver, Colorado) Oct. 29, 2004. (source: Double-Tongued Dictionary)