The term "dropping hammer" can be replaced by various synonyms, such as "final verdict," "decisive blow," "ultimate ruling," "crushing decision," or "clinching judgment." These expressions convey the idea of an event or action that puts an end to a situation or debate. Other possible options could be "trumping verdict," "resolving decision," "definitive action," "conclusive outcome," or "settling motion." The use of these synonyms can add variety of styles and tone to a piece of writing and help to highlight the significance of the moment. Overall, there are many synonyms for "dropping hammer" that can be used effectively in different contexts and situations.