Definition of "skag"

skag

noun
countable and uncountable, plural skags
1. (nautical) Alternative form of skeg
2. (slang) Alternative spelling of scag (“heroin”).
  Quotations
  You will not be able to lose yourself on skag and skip out for beer during commercials, because / The revolution will not be televised
  1971, Gil Scott-Heron (lyrics and music), “The Revolution Will Not Be Televised”
3. (slang) An unattractive woman.
  Quotations
  Ewww! Do you think that's her boyfriend!? Nice Forehead, dude! …Check out the obvious implants on that skag!
  1997, Daniel Clowes, “The Norman Square”, in Ghost World, Jonathan Cape, published 2000, page 49