Yes they have poison glands in their bodies and will eat flesh if given the chance.
rifle slug regular slug
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Slugs are, for the most part, harmless to humans. I'm frankly not sure what the second half of your question is supposed to mean. About the only way a slug could hurt you is if you ate it; and it would likely be parasites in the slug, rather than the slug itself, that caused the problem.
the covering of a slug is slimy
No, a slug is an animal.
What is the function of slug slime
I assume you mean "A" sea slug. No, a sea slug is not a fish, but an echidnoderm.
Slug=Limax
Then you got shat on by a slug.
A cardinal is a carnivore and a slug is not
a slug is a consumer
There is actually a slug called the leopard slug. See related link..