Lol those two girls that we’re seriously about to bully the MC has the Gall to say that bullying the weak is a horrible thing to see when she was about to do so.
It's written Kokoro no Kintama
Literal translation: "the balls inside your heart"
Figurative translation: "The balls inside you", "The spirit of the balls"
I guess the closest translation would just be the slang term "He's got balls." but then you would have to shift the dialogue around to get the joke to land.
The judge and king probably just want to silence her, afraid of what she might know (about their dirty secrets). Her actual crime, and the fact she was the one who stopped the conspiracy, don't matter.