Lard is stored energy from leaner times. Folk tradition reads it as reserves and thrift, while a heap of grease can stand for heaviness you would like to shed.
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.