Sentence:  [T]here will always be spies, and spooks, and counterspooks. Some of these <WSD>slimeballs</WSD> are perhaps breaking into Pentagon computers at this very moment, finding the dirty pictures some bored programmer stored on a corner of the hard disk. 
Meaning of the word marked with <WSD> tags:  A person who is regarded as slimy (that is, sneaky or underhanded) or otherwise undesirable.