1785 Grose Dict. Vulg. T.,Snub devil, a parson.
1875 Knight Dict. Mech. 2231/2Snub-post, a form of bitt or mooring-post on a raft or canal-boat.
1908 H. Day King Spruce xxvi,The snub-line down the steep quarter-mile..made a cut-off that doubled the efficiency of the teams.