What is the definition of Unions Weapon?

An 'unions weapon' is like a union's superhero sidekick, but instead of cape and glider, it's a collective bargaining strategy that can turn a workplace into a battlefield! It's a tool that, when deployed, can either bring peace and prosperity or spark a full-blown labor strike.

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Here's an unsettling example sentence: "When the union declared it was the 'unions weapon' to shut down production, the factory became a battlefield of pickets and picket lines, with the CEO's phone ringing louder than the union's collective bargaining demands."