To see a sloth, when you are dreaming, is indicator of your quality of being passive in important situation. In the dream to experience unwillingness to work or make an effort, symbolizes your need to asserting yourself and making your existence worthy or reputable. The sloth is also symbolic mark of tenderness, gentleness, fondness. Alternatively, the sloth stands for laziness, idleness and lack of strong desire to achieve something.
Dream dictionary: Sloth dream meanings
If you dream of seeing a sloth or being one, then it shows stagnant features of your personality. You must pull yourself together and do something useful, because the stagnation and laziness will lead you to degradation.
Sloths in the dreams represent a warning to react and fight an excess of placidity.