2) Also applies to girls who look a bit dirty in all interpretations of the word.
1) Friend - "Hey, there's a sofa in that skip and it doesn't look too bad, shall we grab it?"
Me - "Ewww, what are you on about! It's got stains on it, that is SO skanky!"
2) "Dude, that bird looks WELL skanky, I bet she's been around!"
Very gross and ugly girl, mostly wears unnecessarily tight clothing and seen with a guy on its arm. Travels alone, packs cause problems for mating rituals.