"scummy" in the adjective sense
1. abject, low, low-down, miserable, scummy, scurvy
of the most contemptible kind
"abject cowardice"
"a low stunt to pull"
"a low-down sneak"
"his miserable treatment of his family"
"You miserable skunk!"
"a scummy rabble"
"a scurvy trick"
2. scummy
covered with scum
"the scummy surface of the polluted pond"
Source: WordNet® (An amazing lexical database of English)
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