A friend sent me a link to the bizarre, funny and wonderful (if a teeny bit too long) movie, “Clark the Hockey Goalie.”
One of the curiosities in the movie is Clark’s etymology for the word “hoser”: According to Clark, in old-tyme hockey (BZ–before Zambonis), the loser of the game had to hose down the rink. So it’s pejorative, like a loser.
However, it was the first I’d heard of it, so I looked it up (why one can never imagine the future … today, I Googled “hoser etymology.”)
My guess is that Clark’s story is as good as any.