The definition of a slimeball is slang for a terrible person.
An example of a slimeball is a manager who is mean to his employees.
Slang a disgusting, despicable person
A despicable or disgusting person.
Origin of slimeballslime + -ball (probably as in oddball).
- (slang) A person who is slimy (in the figurative sense of underhanded, sneaky).