See quot. 1851. Examples in Bartlett, 1848–60.
1851. The “teams” next approach the scene of action, drawing after them a short sled, called a “bob-sled;” probably so named for the bobbing motion it has while drawn over the rough ground.—John S. Springer, ‘Forest Life,’ p. 94 (N.Y.).
1909. The men took a bob-sled out on a hill, and were riding down on the snow crust.—N.Y. Ev. Post, Feb. 18.
