scummy

Definitions of scummy

1. adjective

   covered with scum
   “the scummy surface of the polluted pond”

   synonyms:

   dirty, soiled, unclean

   soiled or likely to soil with dirt or grime
2. adjective

   of the most contemptible kind
   “a scummy rabble”

   synonyms: abject, low, low-down, miserable, scurvy

   contemptible, misbegotten

   deserving of contempt or scorn