A flamethrower is traditionally read as anger turned into a wide, consuming blast, and as the urge to burn away everything at once rather than sort it.
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.