scum

1 ENTRIES FOUND:
scum /ˈskʌm/ noun
plural scums
scum
/ˈskʌm/
noun
plural scums
Britannica Dictionary definition of SCUM
1 
[noncount] : a layer of something unpleasant or unwanted that forms on top of a liquid
2 
informal : a dishonest, unkind, or unpleasant person
[noncount]
[count]

— scummy

/ˈskʌmi/ adjective scummier; scummiest [also more scummy; most scummy]