I was of course with the use as applied to clothing, but no nautical source, though certainly snagging the nearest gear when going above in foul weather makes a lot of sense, as does the fitting out of the shanghaied sailor. I did ask for an explanation but the person who told me declined to divulge it, saying at concerts he sometimes offers to buy a drink for anyone who can tell him the origin. So of course my interest was piqued intellectually and I would love to know the answer next time I see him.