a. | 1. | Covered with scum; of the nature of scum. |
Adj. | 1. | scummy - 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" |