Grammar Class
Literally, the worst place one person can go. If someone is sent there, they face intense shame and humiliation. Used frequently in multiplayer fighting video games (ex. Smash Bros.) when a person kills their enemy’s character by sending them out of the ring/area.
Your Yoshi tried to take out my Dr. Mario, but I punched him hard and sent him straight to Grammar Class. I don't think you  can now look me in the eyes for at least a week.