These Yo Mama insults are deadly, so use them wisely!

Yo Mama so ugly
She goes to the dentist for a colonoscopy.
Yo mama is so ugly she made my happy meal cry.
Yo moma is so stupid, she tried to surf the microwave
Yo mama so old she has a picture of Moses in her yearbook.
Yo mama so old her birth certificate is in Roman numerals.
Yo mama so old she ran track with dinosaurs.
Yo mama so old she was a waitress at the Last Supper.
Yo mama so old she knew Burger King while he was still a prince.
Yo mama so old her birth certificate says expired on it.
Yo mama so old she has a picture of Moses in her yearbook.
Yo mama so old that when she was in school there was no history class.
Yo mama so old her social security number is 1!
Yo mama so old I told her to act her own age, and she died.
Yo mama so old, When she farted dust came out!
Yo momma's so old her first job was as Cain and Abel' babysitter.
Your mom is so fat
Her school picture from first grade is still printing.
Yo momma is so fat, she sweats barbecue sauce.
Yo mama is so fat, her alphabet starts with O.
OBCD.
Yo mamma so old she pre-order the bible.
Yo Momma so stupid, she thought seaweed is something fish smoke.
Yo' Mama is so stupid, she thought Meow Mix was a rap CD for cats.
Yo Mama so short she poses for trophies.
Yo Mama so short she got ran over by a Hot Wheel.
Yo Mama so short she can do limbo under the door.
Yo Mama so short her head smells like feet.
Yo Mama so short when it rains, she's always the last to know.
Yo Mama so short she's Mini-Me's Mini-Me.
Yo Mama so short she's a teller at a piggy bank.
Yo Mama so short she plays soccer with atoms.
Yo Mama so short she uses a toothpick as a pool cue.