The garbage collector stands for letting go of what is no longer needed. Dream books read the figure as a sign of being ready to release old habits or burdens.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.