When someone kills a large group of people using something completely useless normally. Ex. Sampson, in the bible, killing 1000 men with a donkey's jawbone. Or Vin in the Mistborn Trilogy, killing a huge group of guards with a belt buckle.
Five hats means that five tropers think it is ready to publish.
You are saying that you think this draft is ready to be published. That means the description is not ambiguous,
it doesn't duplicate an existing trope, there are at least three examples, and the title makes sense.