Yo mama is so ugly that she could be the poster child for birth control.
Yo momma so stupid you have to dig for her IQ!
Your Mom is so skinny she has to wipe her ass with dental floss.
The friend of my mother has taken look at the photo on which I was and has said: "yeah, the stepfather of Johny is a real expert of breeding of meaty pig types."
Yo' Mama is so nasty, her flyswatter doubles as a spatula.
Yo mama so stupid that when she turned on airplane mode...
She thought she could fly.
Vote:
Yo' Mama is so nasty, when her dog farts, she takes the credit.
Yo momma so fat that when she went to her prom she literally raised the roof.
Yo mamma so fat and scary, Godzilla watches "yo mamma" movies!
Yo' Mama is so fat, I had to dip her in flour to find her wet patch.