What is the meaning of Slimeball?

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

  1. A mucus-coated lump containing the cercariae (parasitic larvae) of a liver fluke (of the phylum Platyhelminthes).

A mucus-coated lump containing the cercariae (parasitic larvae) of a liver fluke (of the phylum Platyhelminthes).

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

Source: wiktionary.org