Always wondered about that myself.
My idea is to drop tons of ice into it, to cool the temps and rob it of energy. /s
The quantities of ice necessary would be huge. You probably would only have to disable it and not kill it all together. Still, it is a lot of energy to suck out of something that massive.
Another way to dissapate the energy is to drop something or somethings into it and steal it of rotational inertia. Thousands of projectiles swirling within the cloud chopping up everything. Doesn’t sound good.