I am a figment of your imagination, therefore you are non-existent.
A way to tell someone they’re so fake, they don’t even exist.
'I am a figment of your imagination, therefore you are non-existent.', said to a kid who kept claiming they had a magical sword.
Used in a text to a classmate who kept lying about being a superhero.
Shouted in the hallway to someone who thought they were the main character of everyone’s life.