From the movie "The Last Starfighter", the Death Blossom is a uni-directional super weapon which fires all over the place, hitting everything within range.
If you are taking on a whole bunch of people, you could be said to be doing a "Death Blossom".

American military slang from the war in Iraq: the tendency of Iraqi security forces, in response to receiving a little fire from the enemy, to either run away or do the "death blossom," spraying fire indiscriminately in all directions. Reported on Globalsecurity.org