toboggan n.

"long, flat-bottomed sled," 1829, from Canadian French tabagane, from an Algonquian language, such as Maleseet /thapaken/. The verb is recorded from 1846. As American English colloquial for a type of long woolen cap, it is recorded from 1929 (earlier toboggan cap, 1928), presumably because one wore such a cap while tobogganing.