Yo momma so fat she goes to a resturant, looks at the menu and says "okay!" 
Yo mama is so fat when she ordered a waterbed, I gave her the atlantic ocean.
Your momma so fat...
When she goes to the zoo the elephants throw your momma peanuts.
Yo momma's so old if she were a car it would be time to roll back her odometer.
Yo' Mama is so old, she went to an antique shop, and they kept her.
You mama is so fat, when she lies on the beach Greenpeace try to push her back in the water.
Yo' Mama is so fat, she puts in tampons with a bazooka.
Yo mama so fat when she was in school she sat by everybody!
Yo' Mama is so fat, the hippos at the zoo get jealous of her figure.
Your mom's so dumb, she threw the dog and told the stick to fetch!