Mutually Assured Destruction

Definition:

Mutually assured destruction is when two parties end up destroying each other. This can happen at the end of narcissistic relationships.

Exemplification of Usage:

Me: My relationship with David devolved to a platform of mutually assured destruction. He nearly took my life, so I made sure to destroy his reputation. He took my money, so I took his. He cheated on me, so I cheated on him. We were both nearly destroyed by the end...

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