nastyass

adjective3

1. •
   (US, slang) disgusting, gross

   • And what a nastyass stale butt it was too, already smoked once and picked out of the ashtray, tasting burnt smoke. — 1991
2. •
   (slang, offensive) loathsome, contemptible
3. •
   (US, slang) badass

   • "SWAT uses those nastyass hollow points. A head-hit pretty much turns everything into Hamburger Helper. — 2011