Sarcasm says one thing and means another, so tradition reads it as hostility or hurt dressed up as humour. It often points to something that would be painful to say plainly.
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.