Yo mama's so short she models for trophies.
Yo mama's so ugly that when she tried to enter an ugly contest, they told her "no professionals."
Yo mama so skinny she has to wear a belt with spandex.
Yo mama's so old that when she went to school, there was no history class.
Yo mama's so dumb it took her six hours to put a bag of M&Ms in alphabetical order.