posthole
v.— «He said people who walk through deep snow without snowshoes, a process he called post-holing, without proper footwear could be setting themselves up for trouble.» —“Conditions tough for start of summer hiking season” by Wilson Ring, David Tirrell-Wysocki, Jerry Harkavy Seacoastonline.com (Portsmouth, New Hampshire) May 21, 2008. (source: Double-Tongued Dictionary)