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The Facepalm of Justice is when someone does something so dumb it makes your face go numb and you yell it like it's the last thing you'll ever say.
I tried to fix my Wi-Fi by unplugging the router and yelling at it. Facepalm of Justice.
My friend decided to text his mom a picture of his sandwich at 2 a. m. Facepalm of Justice.
He tried to eat a whole pizza in one bite and cried like a baby. Facepalm of Justice.