You are fat. See ur gay. It is a good insult/comeback to use on fat people.

when you're hungover as shit after a spending a night drunk as a skunk

Singularly the best insult committed to text message

Ur fat is used by a child when all hope is lost. When they can't think of an insult so they say ur fat. I told this to my dad I now don't have an eye. But when you are losing hit them with an ' ur fat ' and watch them laugh at you. *Please note children if you say this to your teacher that's a woman they will take it personally.