scum + -y
scummy (comparative scummier, superlative scummiest)
- Covered in scum.
- We have to wash your trousers: they're all scummy.
- (slang) sleazy, worthless, no good
- 2006, Arctic Monkeys, When the Sun Goes Down (song)
- And what a scummy man / just give him half a chance / I bet he'll rob you if he can.