Beats your meat

What does this term mean?
Women have said it to me many times, but I'm not sure what they mean.

It's a slang term, referring to a man with a large penis.

I'm sure your female acquaintences meant to say that you should be "well hanged" for teasing us credulous folk here at Phrase Finder.

It is not supposed to be hanging to do the most good. Have you tried any of these new drugs to fix the problem, young man?

'well-hung' as well as suggesting trousers full of tackle, also refers to meat/game that has been left hanging as a from of preparation. Apparently meat and game improve in flavour if left hanging for a while. Obviously to begin with hanging allows bodily fluids to drain out, but I don't really understand why meat should be hung beyond that.