Covered with scum.

adjective. Covered with scum; of the nature of scum.

adjective. Covered in scum.

adjective. sleazy, worthless, no good

adjective. covered with scum

adjective. of the most contemptible kind

"That is what I call a scummy estate: filthy, evidence of drugs use everywhere, constant reminders of threat of crime, the sort of place taxis won't pick up from."

contemptible  dirty  soiled  unclean  

black-brown  fat-cat  glass-like  half-frozen  hedge fund  

abject  abominable  arrant  atrocious  barfy