j'accuse
French for, "I'm calling you out, and I don't care if you have a sword." It's like when you finally snap and tell someone they're a complete mess.
"J'Accuse! You forgot my birthday." said my best friend in a group chat.
"J'Accuse! You ate my sandwich." shouted the kid in the lunchroom.
"J'Accuse! You cheated on my dog." yelled the cat.