Jiu-jitsu, fought close to the ground, is read as patience and technique overcoming sheer strength. It may reflect working your way out of a tight spot calmly rather than by force.
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.