Yo' Mama is so stupid, her wig has a chinstrap.
Yo mama is so fat, the recursive function computing her mass causes a stack overflow.
Yo Mama so old...
She recalls When the Grand Canyon was a ditch.
Yo' Mama is like a telephone book: available to the public, no charge.
Yo momma so fat, her patronus is a cake.
Yo mama so ugly that she died of fright when she looked in the mirror.
Yo' Mama is so fat, every time you smack her butt, you can ride the waves.
Yo mama so fat, when she plays hopscotch, she plays like this New York, Chicago, New Orleans, L.A.
Yo Mama so old...
When Moses parted the Red Sea, he found yo mama fishing on the other side!
Yo mama so ugly Lady Liberty blew her torch out so she wouldn't have to see her.