If you dreamed of the slugs, then it means that you are taking things easy with no rush and working on particular subject carefully and slowly. Consider, that sometimes the slowness that you carry on might annoy those you are surrounded by. If the slugs are coming out of your body, then it means that you find it hard to show your emotions for others.
Dream dictionary: SLUGS dream meanings
…Slugs in dreams foretell jealousy….