Whoa!
Skank has two musical meanings that I know of, one "old" as Wow describes, and another right up to date. Skank bands are bands which combine sophistication and technical expertise with a certain basic grittiness (which is probably why "skank"). Steely Dan is MY skank band.
The other meaning of skank was (and maybe still is) sexually dirty, messy, fetishy. A friend of mine who works for the censor here once said that a lot of "skank" porno is crossing their desks. He wasn't carrying any samples with him
, but the way he described it, it is the antithesis of the "glamour" type of porn that you get in Playboy - it's messy and down and dirty. Maybe it's an indicator of the quality of the photography or something. I rather shudder to think of the alternatives ...
I've never looked "manky" up in the dictionary, but I've only ever heard it used here by non-Americans and it is usually used to mean pretty much what jmh says.
