Yo mama is so fat that when she walks, the ground shakes…
I did not grow up with Yo Mama, but I feel this is a very important part of childhood and wish to prepare my progeny properly.
So…
Without further adieu…
Let 'er rip.
Yo mama teeth so rotten, when she smile, it look like she have a mouthful of dice.
Yo mama so fat, when she steps on the scale it says ‘To Be Continued’.
You’d all like to read A Portrait of Yo Mama as a Young Man.
Yo mama so fat, when she put on a pair of BVDs, it end up spelling BOULEVARD.
Your ma’s like the Eiffel Tower, half of Europe’s been up her.
I think this one’s a moldy oldie but a goodie?
Yo Mama is so fat, she leaves potholes when she walks.
Yo mama’s so fat, she jumped up in the air and got stuck.
Yo mama’s teeth so yellow she spit butter
Yo mama’s so old, when Moses parted the Red Sea, she was on the other side fishing.
Yo mama’s so fat, when she put on a Malcolm X jacket, helicoptors land on her back.
Yo mama so fat, when she step on the scale, it says ‘One at a time! Please!’
And the classic: Yo mama so fat, when she sits around the house, she SITS AROUND THE HOUSE.
Yo mama’s so poor, I saw her kickin’ a can down the street and asked what she was doing, and she said “movin’!”
Yo mama’s so ugly when she goes in the bank they turn off the surveillance cameras.
Yo mama’s so ugly she has to trick or treat over the phone.
Yo mama’s so short her feet are in her driver’s license picture.
Yo mama’s so dumb it takes her two hours to watch “60 Minutes.”
Yo mama’s so fat, when God said “Let there be light” he told yo mama to get her fat ass out the way.
Yo mama’s so fat, when she wear a red dress all the kids sing “Hey, ho, Kool Aid” (you need the swinging arms with this, like in the old commercials.)
This video should help:
yo mama’s so old, Jesus signed her yearbook.
yo mama’s so old, when God said let there be light, she flipped the switch.
yo mama’s like a doorknob, everybody gets a turn.
Yo mama’s so old, she remembers when yo mama jokes were popular
Your momma’s so old she got powdered milk coming out of her titties.
Your momma’s so fat her blood type is ‘gravy’.
Your momma’s so fat, I saw her go into a restaurant and when the waiter handed her the menu, she looked through it and said ‘o.k.’
Yo mama so fat, she got smaller fat women in orbit around her.
Yo mama so old, Jesus has his picture in her high school yearbook.
Yo mama so fat, when I fuck her I gotta roll her in flour and look for the wet spot.
Yo mama so dumb, it take her an hour to watch 60 Minutes.
Yo mama so dumb, she studied for her drug test.
Yo mama so ugly that when she went to sign up for the ugly contest they said “Sorry, ma’am, no professionals.”
Yo mama so poor, when I went to her trailer a rat stole my wallet.
Yo mama so poor, the only time she smell hot food is when a rich guy farts.
Yo mama so poor, she got to do her drive-by shootings on the bus.
Shall I go on? This was an art-form when I was in middle school.
ETA - I forgot one of my favoties - Yo mama so po - shit, she can’t even afford them last two letters!
Yo mama so fat after sex she rolls over and smokes a ham.
Yo mama so fat she’s on both sides of the family.
Yo mama so fat when she hauls ass it takes two trips.
Yo mama so fat her nickname is ‘DAMN!’.
These are awesome!
Keep them coming!
I’ve noted the Yo Mama book for library pick up. YAY!
His mama so socially awkward she gotta get books about yo mama humor from the liberry. 
I’m afraid I’m not up to code on the yo mama jokes, so all I have are the old ones.
Yo mama so fat, I just slap her thigh and ride the wave in.
Yo mama so fat, after we have sex I gotta roll over four times.
If my dog’s face looked like yo mama, I’d shave his ass and make him walk around backwards.
Yo mama’s teeth so yellow, when she smile the sun gets jealous.
Yo mama so fat the only thing keeping her from Jenny Craig is the door.
Yo mama so ugly, we gotta tie a steak to her neck to get the dog to play with her.
When yo mama was a baby, they had to feed her with a blindfold and a slingshot.
When yo mama was born, her mama slapped the doctor and said “cut the shit, i want my kid.”
When yo mama was born, the doctor slapped her mama.
Yo mama so fat, when she goes to the beach, environmentalists keep trying to push her back in the water.