Yo mama is so fat when she sat on WALMART she lowered the price. 
Yo mama so fat when god said let there be light she was told to move out of the way.
Yo momma so fat when she jumps up in the air she gets stuck!
Q: How do you find how many fat people are in America?
A: Throw a cookie into the street.
Yo momma so fat she could go to the desert and sells shade.
Yo momma so fat when she stepped on the scale it came up with my phone number.
Yo mama's so fat the only alphabet she knows is her KFCs.
Yo mama is so fat that her ass is a laundry so we can iron anything on it.
Yo' Mama is so fat, she uses a mattress for a maxipad.
Yo momma is so fat she made chocolate frogs go extinct.