Growing up in Virginia, a "toboggan" was a knit hat. Only when I left the nest did I find out that to most people, a toboggan is a sled. A little googling revealed a discussion about this very discrepancy.
How very bizarre that this relatively long, unique word can mean two very different things! I'd like the linguists to explain this one.
A Google image search illustrates the double meaning as 95% of pictures show a sled and the remainder, a knit hat.