Yo mama so fat, that when she got on the titanic, it sunk right away, and the only reason that this story is different is because the people who've told others about it were scared that she would sit on them.
Yo mama so fat when she went to the movies she filled up the whole room.
Yo mama so fat people used her as a tramp.
Q: Why don't fat people were turtlenecks? A: Because turtles are now endangered.
Yo momma so fat, she fell into a black hole and it clogged!
Yo mama is so fat, she doesn't fit in this joke.
Yo mama is so fat, it says to be continued, when she gets on a weighing-machine.
Yo mama so fat when she went swimming, The Japanese harpooned her and took her back to Japan to sell her blubber.
Yo' Mama is so fat, NASA used her to plug a black hole.
Yo mama so fat that when she sat on a rainbow she made Skittles!