When slugs eat dead vegetation, they help the soil by making compost, especially after they excrete.
Slugs produce a trail of slime (mucus) as they glide along the ground to move. This slime has many properties. One of these is being good for human skin. There is a type of skin renewal using the slime from slugs.
Dreaming of slug can mean you are being reminded that you resemble a slug. Maybe you move slowly, like a slug. Maybe you are fragile and easily crushed. You might be retreating into your shell, like a snail. You might be vulnerable to external forces which can crush your shell and destroy you.
If these dream interpretations relate to your present circumstances, you can take heed of the reminder and work on helping yourself.
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