Flesh stands for the physical self, desire and mortality — the body as opposed to the spirit. Dream books read it as attention to bodily needs and appetites.
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.