Dreams about bodily functions, such as pooping, can often symbolize the release of pent-up emotions or stress. A soakaway, being a system designed to drain away water, may represent your desire to let go of emotional burdens or to cleanse yourself of negativity in your waking life.

In this context, pooping into a large soakaway could indicate that you are in a phase where you are trying to rid yourself of something that has been weighing you down, whether it be worries, guilt, or past experiences. The size of the soakaway might suggest that you are ready to release a significant amount of these feelings or that you are seeking a fresh start.

Consider reflecting on any current situations in your life where you feel the need to let go or move on. This dream could be urging you to confront and release these emotions for your well-being.