Dreaming about a sloth indicates feelings of being stuck and unhappiness with your current situation. The sloth is a purely biological feeling, a kind of sedate quality that also has an emotional dimension. Encountering the sloth in a dream means that you are suffering from a sticky resistance to change, being unmotivated to get up and face life.
Lastly, a sloth in a dream usually indicates that the person is feeling sluggish or crazy tired. It is common for people to feel this way when they are working and overworking themselves, which may or may not be what they want out of life.