shag-nasty

shag-nasty

slang Particularly nasty or disgusting. The room they gave us was shag-nasty, but it was already 1 AM and there wouldn't be another motel for several hours at least. Judging by the shag-nasty gunk that came out of their engine, I'd say they haven't changed the oil in years.
Farlex Dictionary of Idioms.

shag-nasty

mod. nasty. I want out of this shag-nasty mess.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • lumbo
  • yucky
  • skrungy
  • turn nasty
  • get nasty
  • get/turn nasty
  • snarl out
  • leave a nasty taste in (one's) mouth
  • leave a nasty taste in the mouth
  • be a nasty piece of work