slimeball

A round lump made up of or coated with slime or a slime-like substance such as mucus.

A round lump made up of or coated with slime or a slime-like substance such as mucus.

The eggs [of a lancet fluke (Dicrocoelium dendriticum)] that pass out with the manure of an infested sheep do not hatch in the open. When eaten by the snail, they hatch and finally give rise to larvae that pass out of the snail's body in gelatinous "slime[-]balls."

The cercariae contain massive glands, formerly considered to be penetration glands, but now believed to produce the slime responsible for the formation of these balls. It is likely that the slime produced by the snail itself may contribute, at least partly, to the formation of a slimeball.

A person who is slimy (that is, sneaky or underhanded) or otherwise undesirable.

Even slimeballs were entitled to representation, though.

And I put my hands on her jugs. She goes crazy. She says 'Take your hands off me slimeball!' So I go, 'Rona, watch your language!' And she goes, 'If you wanna have fun with your hands, why don't you pass the time playin' solitaire.'