Retroactive Justification
When you call someone out who's wronged you and they try to use your response, anger, or retaliation to justify what they did.
Person A: "I only lied because I knew you'd react like this!"
Person B: "That's some retroactive justification bullshit! That's not how time works. The cause happens BEFORE the result, dumbass!"
Person B: "That's some retroactive justification bullshit! That's not how time works. The cause happens BEFORE the result, dumbass!"