I was born fat!
You say it to someone who acts like they're giving you a compliment when they're just being a bully.
My teacher said I was fat and I told her I was born fat and she got sent to the principal's office.
My friend said I was fat and I told him I was born fat and he had to do 20 push-ups.
My dad said I was fat and I told him I was born fat and he said I was born lazy too.