What is the definition of Relationships Weapon?

A 'elationship weapon' is like a superhero, but instead of a cape and a cape-cloak, it's a pair of emotional blackjack cards. It's used to either protect your heart from a heartbreak or to get someone to confess their secret bad habits. It's the ultimate tool in the arsenal of love, but let's be real, it can also be used to sabotage a friendship like a trusty saboteur in a military operation.

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Here's an edgy example sentence: "After years of avoiding each other, Sarah decided to wield her relationship weapon - her ex-boyfriend's unparalleled charm - and see if he'd let his guard down before she finally broke up with him for good."