Secret Santa is read as giving without being seen and receiving from an unexpected hand. Dream books link it to curiosity about what others think of you, and to kindness that does not need credit.
Has this come up in your dreams before? What was going on in your life then?
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.