scummy

Adjective

• covered with scum
  • the scummy surface of the polluted pond
    

• 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
    

Related words

• Synonyms: 
  abject , low , low-down , miserable , scurvy