Yo mama so nasty that when she goes to the universal studios children follow her shouting "Shrek! Shrek!" 
Yo mamas so poor she traded her car for gas money.
Yo' Mama is so poor, when you ring her doorbell, she sticks her head out the window and yells, "DING DONG!"
Yo Mama's so dumb she waited all day at a stop sign.
Fly like a butterfly sting like a bee I slept with yo mama now it burns when I pee.
Yo mama is so stupid, I said it was going to be chili out and she grabbed a bowl and a spoon.
Yo' Mama is so poor, when I asked where her bathroom was, she said, "Fourth bottle from the left."
Yo mamma so old she pre-order the bible.
Yo mama so dumb, she thought General Motors was in the army.
Yo mama so fat she has more rolls than a bakery.