Yo mama so fat that when she bungee jumped from the Empire State building, it bent over when she jumped.
Yo mama so old that she has wedding pictures with a T-Rex.
Yo mama so fat that when she laid down on the beach, people yelled, "Beached whale!"
Yo mama so fat that when she went into an elevator, there 3 people in it, the weight capacity is 750 lbs., the people yelled, "NO!"
Yo mama so fat that satellites orbit around her.
Yo mama so fat and dirty that people kept asking a farmer, "How'd she get out of the pig pen?"
Yo mama so stupid that she got hit by a parked car.